2025

• Rygg, Marite; Ramos, Filipa Oliveira; Nordal, Ellen Berit. (2025) What have we learned from long-term studies in juvenile idiopathic arthritis? – Prediction, classification, transition. Pediatric Rheumatology
  Academic literature review
• Vassis, Stratos; Glerup, Mia; Tambjerg, Ida; Küseler, Annelise; Resnick, Cory M.; Verna, Carlalberta. (2025) Development of a 3D cephalometric index to grade severity of dentofacial deformity in patients with juvenile idiopathic arthritis. Scientific Reports
  Academic article
• Ekelund, Maria; Szentpetery, Agnes; Arnstad, Ellen Dalen; Aalto, Kristiina; Fasth, Anders; Glerup, Mia. (2025) Clinical Impact of HLA-B27 on Juvenile Idiopathic Arthritis: Eighteen Years of Follow-up in the Population-Based Nordic Juvenile Idiopathic Arthritis Cohort. ACR Open Rheumatology
  Academic article
• Angenete, Oskar W; Haustreis, Janne Kristin; Aune, Lisbeth K.; Lundestad, Anette; Cetrelli, Lena Elisabet; Augdal, Thomas Angell. (2025) Children as controls in research; The voice of the volunteer. PLOS ONE
  Academic article
• Tuomi, Anna-Kaisa; Rebane, Katariina; Arnstad, Ellen Dalen; Berntson, Lillemor; Fasth, Anders; Glerup, Mia. (2025) Age at diagnosis as a prognostic factor in selected categories of juvenile idiopathic arthritis. RMD Open
  Academic article

2024

• Lundestad, Anette; Cetrelli, Lena Elisabet; Angenete, Oskar W; Augdal, Thomas Angell; Tylleskär, Karin Birgitta; Nordal, Ellen Berit. (2024) Bone health in juvenile idiopathic arthritis compared to controls based on a Norwegian observational study . Pediatric Rheumatology
  Abstract
• Ekelund, Maria; Szentpetery, Agnes; Arnstad, Ellen Dalen; Aalto, Kristiina; Fasth, Anders; Glerup, Mia. (2024) HLA-B27 is associated with worse outcome in juvenile idiopathic arthritis (JIA) after 18 years in a long-term Nordic cohort study. Pediatric Rheumatology
  Abstract
• Tuomi, Anna-Kaisa; Rebane, Katariina; Arnstad, Ellen Dalen; Berntson, Lillemor; Fasth, Anders; Glerup, Mia. (2024) Body mass index is associated with health-related quality of life and disease characteristics in young adults with juvenile idiopathic arthritis. Pediatric Rheumatology
  Academic article
• Rypdal, Veronika Gjertsen; Glerup, Mia; Rypdal, Martin Wibe; Arnstad, Ellen Dalen; Aalto, Kristiina; Berntson, Lillemor. (2024) Disease activity trajectories from childhood to adulthood in the population-based Nordic juvenile idiopathic arthritis cohort. RMD Open
  Academic article
• Glerup, Mia; Kessel, Christoph; Foell, Dirk; Berntson, Lillemor; Fasth, Anders; Myrup, Charlotte. (2024) Inflammatory biomarkers predicting long-term remission and active disease in juvenile idiopathic arthritis: a population-based study of the Nordic JIA cohort. RMD Open
  Academic article
• Cetrelli, Lena Elisabet; Lundestad, Anette; Gil, Elisabeth Grut; Fischer, Johannes Maria; Halbig, Josefine Mareile; Frid, Paula Hanna Therese. (2024) Serum and salivary inflammatory biomarkers in juvenile idiopathic arthritis—an explorative cross-sectional study. Pediatric Rheumatology
  Academic article
• Szentpetery, Agnes; Glerup, Mia; Aalto, Kristiina; Arnstad, Ellen Dalen; Fasth, Anders; Herlin, Troels. (2024) Characteristics That Predict Psoriatic Arthritis by the Classification Criteria for Psoriatic Arthritis in Patients With Juvenile Idiopathic Arthritis 18 Years After Disease Onset. ACR Open Rheumatology
  Academic article
• Arneng, Sofie Mikalsen; Jenssen, Isabelle Pignatel; Lundestad, Anette; Cetrelli, Lena Elisabet; Angenete, Oskar W; Nordal, Ellen Berit. (2024) The patient’s voice: a cross-sectional study of physical health and disability in juvenile idiopathic arthritis. Pediatric Rheumatology
  Academic article
• Hestetun, Sigrid Valen; Rudsari, Hamid Khoshfekr; Jaholkowski, Piotr Pawel; Shadrin, Alexey; Haftorn, Kristine Løkås; Andersen, Svend. (2024) Incidence and Genetic Risk of Juvenile Idiopathic Arthritis in Norway by Latitude. Arthritis & Rheumatology
  Academic article

2023

• Rypdal, Veronika Gjertsen; Glerup, Mia; Arnstad, Ellen Dalen; Aalto, Kristiina; Berntson, Lillemor; Fasth, Anders. (2023) Exploring factors that may influence the scoring of the patient’s global assessment of well-being – results of the 18 years juvenile idiopathic arthritis Nordic JIA cohort. . Pediatric Rheumatology
  Abstract
• Halbig, Josefine Mareile; Jönsson, Birgitta; Gil, Elisabeth Grut; Åstrøm, Anne-Kristine N; Rypdal, Veronika Gjertsen; Frid, Paula Hanna Therese. (2023) Oral health-related quality of life, impaired physical health and orofacial pain in children and adolescents with juvenile idiopathic arthritis – a prospective multicenter cohort study. BMC Oral Health
  Academic article
• Schreiber, Karen; Giles, Ian; Costedoat-Chalumeau, Nathalie; Nelson-Piercy, Catherine; Dolhain, Radboud J E M; Mosca, Marta. (2023) Global comment on the use of hydroxychloroquine during the periconception period and pregnancy in women with autoimmune diseases. The Lancet Rheumatology
  Letter to the editor
• Halbig, Josefine Mareile; Jönsson, Birgitta; Gil, Elisabeth Grut; Åstrøm, Anne-Kristine N; Rypdal, Veronika Gjertsen; Frid, Paula Hanna Therese. (2023) Oral health related quality of life, impaired physical health and orofacial pain in children and adolescents with juvenile idiopathic arthritis . BMC Oral Health
  Academic article
• Brix, Ninna; Glerup, Mia; Foell, Dirk; Kessel, Christoph; Wittkowski, Helmut; Berntson, Lillemor. (2023) Inflammatory Biomarkers Can Differentiate Acute Lymphoblastic Leukemia with Arthropathy from Juvenile Idiopathic Arthritis Better Than Standard Blood Tests. Journal of Pediatrics
  Academic article
• Foell, Dirk; Saers, Melanie; Park, Carolin; Brix, Ninna; Glerup, Mia; Kessel, Christoph. (2023) A novel serum calprotectin (MRP8/14) particle-enhanced immuno-turbidimetric assay (sCAL turbo) helps to differentiate systemic juvenile idiopathic arthritis from other diseases in routine clinical laboratory settings. Molecular and cellular pediatrics
  Academic article
• Glerup, Mia; Kessel, Christoph; Foell, Dirk; Berntson, Lillemor; Fasth, Anders; Myrup, Charlotte. (2023) Inflammatory biomarkers in relation to long-term remission and active disease. A population-based study of the Nordic JIA cohort. . Pediatric Rheumatology
  Abstract
• Wang, Qiang; Martínez-Bonet, Marta; Kim, Taehyeung; Sparks, Jeffrey A.; Ishigaki, Kazuyoshi; Chen, Xiaoting. (2023) Identification of a regulatory pathway governing TRAF1 via an arthritis-associated non-coding variant. Cell Genomics
  Academic article

2022

• Gil, Elisabeth Grut; Åstrøm, Anne-Kristine N; Lie, Stein Atle; Rygg, Marite; Fischer, Johannes; Rosén, Annika. (2022) Dental plaque and gingival bleeding in adolescents with juvenile idiopathic arthritis and controls: a multilevel analysis. Acta Odontologica Scandinavica
  Academic article
• van Dijkhuizen, E. H. Pieter; Ridella, Francesca; Naddei, Roberta; Trincianti, Chiara; Avrusin, Ilia; Mazzoni, Marta. (2022) Validity and Reliability of Four Parent/Patient–Reported Outcome Measures for Juvenile Idiopathic Arthritis Remote Monitoring. Arthritis care & research
  Academic article
• van Straalen, Joeri W.; de Roock, Sytze; Giancane, Gabriella; Consolaro, Alessandro; Rygg, Marite; Nordal, Ellen Berit. (2022) Real-world comparison of the effects of etanercept and adalimumab on well-being in non-systemic juvenile idiopathic arthritis: a propensity score matched cohort study. Pediatric Rheumatology
  Academic article
• Gårdvik, Kari Skulstad; Indredavik, Marit Sæbø; Rygg, Marite; Torgersen, Terje. (2022) Psychatric morbidity and associated factors over three years in an adolescent psychiatric population - A prospective cohort study. Norwegian University of Science and Technology
  Doctoral dissertation
• Cetrelli, Lena Elisabet; Bletsa, Athanasia; Lundestad, Anette; Gil, Elisabeth Grut; Fischer, Johannes Maria; Halbig, Josefine Mareile. (2022) Vitamin D, oral health, and disease characteristics in juvenile idiopathic arthritis: a multicenter cross-sectional study. BMC Oral Health
  Academic article
• Gil, Elisabeth Grut; Skeie, Marit Slåttelid; Halbig, Josefine Mareile; Jönsson, Birgitta; Lie, Stein Atle; Rygg, Marite. (2022) Oral health-related quality of life in 4-16-year-olds with and without juvenile idiopathic arthritis. BMC Oral Health
  Academic article
• Glerup, Mia; Arnstad, Ellen Dalen; Rypdal, Veronika; Peltoniemi, Suvi; Aalto, Kristiina; Rygg, Marite. (2022) Changing patterns in treatment, remission status, and categories in a long-term Nordic cohort study of juvenile idiopathic arthritis. Arthritis care & research
  Academic article
• Brix, Ninna; Glerup, Mia; Foell, Dirk; Kessel, C; Wittkowski, Helmuth; Berntson, Lillemor. (2022) P006: IL-4 and S100A9 can differentiate acute lymphoblastic leukemia from juvenile idiopathic arthritis better than existing laboratory values. Pediatric Rheumatology
  Abstract
• Rypdal, Veronika; Glerup, Mia; Rypdal, Martin Wibe; Arnstad, Ellen Dalen; Aalto, Kristiina; Berntson, Lillemor. (2022) O24: Disease activity measures in Juvenile idiopathic arthritis from childhood to adulthood in the Nordic JIA cohort. Pediatric Rheumatology
  Abstract
• Mikola, Katriina; Rebane, Katariina; Arnstad, Ellen Dalen; Berntson, Lillemor; Fasth, Anders; Glerup, Mia. (2022) Transitioning patients with juvenile idiopathic arthritis to adult care: the Nordic experience. Pediatric Rheumatology
  Academic article
• Glerup, Mia; Kessel, C; Foell, Dirk; Høllsberg, Malene; Berntson, Lillemor; Fasth, Anders. (2022) P020: Biomarkers related to myeloid derived cells obtained at baseline and at 18-year follow-up in juvenile idiopathic arthritis. Relation to remission status and inactive disease. Pediatric Rheumatology
  Abstract
• Toumi, Anna-Kaisa; Rebane, Katariina; Arnstad, Ellen Dalen; Berntson, Lillemor; Fasth, Anders; Glerup, Mia. (2022) P082: Body mass index is related to disease parameters in young adults with juvenile idiopathic arthritis. . Pediatric Rheumatology
  Abstract

2021

• Brix, Ninna; Glerup, Mia; Thiel, Steffen; Mistegaard, Clara Elbæk; Skals, Regitze Gyldenholm; Berntson, Lillemor. (2021) M-ficolin: a valuable biomarker to identify leukaemia from juvenile idiopathic arthritis. Archives of Disease in Childhood
  Academic article
• Arnstad, Ellen Dalen; Glerup, Mia; Rypdal, Veronika Gjertsen; Peltoniemi, Suvi; Fasth, Anders; Nielsen, Susan. (2021) Fatigue in young adults with juvenile idiopathic arthritis 18 years after disease onset: data from the prospective Nordic JIA cohort. Pediatric Rheumatology
  Academic article
• Gårdvik, Kari Skulstad; Rygg, Marite; Torgersen, Terje; Wallander, Jan Lance; Lydersen, Stian; Indredavik, Marit Sæbø. (2021) Association of treatment procedures and resilience to symptom load three-years later in a clinical sample of adolescent psychiatric patients. BMC Psychiatry
  Academic article
• Angenete, Oskar W; Augdal, Thomas Angell; Rygg, Marite; Rosendahl, Karen. (2021) MRI in the Assessment of TMJ-Arthritis in Children with JIA; Repeatability of a Newly Devised Scoring System. Academic Radiology
  Academic article
• van Straalen, Joeri W.; de Roock, Sytze; Giancane, Gabriella; Rygg, Marite; Nordal, Ellen Berit; Rubio-Perez, Nadina. (2021) P48 No significantly different effect of etanercept and adalimumab on well-being in non-systemic JIA. Proceedings of the 27th European Paediatric Rheumatology Congress (PReS 2021): Virtual. 19-21 September 2021. Pediatric Rheumatology
  Abstract
• Brix, Ninna; Glerup, Mia; Thiel, Steffen; Mistegaard, Clara Elbæk; Skals, Regitze Gyldenholm; Berntson, Lillemor. (2021) P6 M-ficolin: A valuable biomarker to identify leukemia from juvenile idiopathic arthritis. Proceedings of the 27th European Paediatric Rheumatology Congress (PReS 2021): Virtual. 19-21 September 2021. Pediatric Rheumatology
  Abstract
• Lundestad, Anette; Cetrelli, Lena Elisabet; Frid, Paula; Hoff, Mari; Hoftun, Gry Børmark; Bletsa, Athanasia. (2021) P198 Biomarkers in juvenile idiopathic arthritis associated with inflammation and bone health. Proceedings of the 27th European Paediatric Rheumatology Congress (PReS 2021): Virtual. 19-21 September 2021. Pediatric Rheumatology
  Abstract
• Gårdvik, Kari Skulstad; Torgersen, Terje; Rygg, Marite; Lydersen, Stian; Indredavik, Marit Sæbø. (2021) Suicidality, function and associated negative life events in an adolescent psychiatric population at 3-year follow-up. BMC Psychiatry
  Academic article
• van Straalen, Joeri W.; Krol, Roline; Giancane, Gabriella; Panaviene, Violeta; Ailioaie, Laura Marinela; Dolezalova, Pavla. (2021) Increased incidence of inflammatory bowel disease on etanercept in juvenile idiopathic arthritis regardless of concomitant methotrexate use. Rheumatology
  Academic article
• Gil, Elisabeth Grut; Åstrøm, Anne-Kristine N; Lie, Stein Atle; Rygg, Marite; Fischer, Johannes ; Rosén, Annika. (2021) Dental caries in children and adolescents with juvenile idiopathic arthritis and controls: a multilevel analysis. BMC Oral Health
  Academic article

2020

• Glerup, Mia; Stoustrup, Peter Bangsgaard; Matzen, Louise Hauge; Rypdal, Veronika Gjertsen; Nordal, Ellen Berit; Frid, Paula. (2020) Longterm Outcomes of Temporomandibular Joints in Juvenile Idiopathic Arthritis: 17 Years of Followup of a Nordic Juvenile Idiopathic Arthritis Cohort. Journal of Rheumatology
  Academic article
• Arnstad, Ellen Dalen; Iversen, Johanne Marie; Uglem, Martin; Glerup, Mia; Romundstad, Pål Richard; Sand, Trond. (2020) Pain sensitivity in young adults with juvenile idiopathic arthritis: a quantitative sensory testing study. Arthritis Research & Therapy
  Academic article
• Rypdal, Veronika Gjertsen; Glerup, Mia; Songstad, Nils Thomas; Bertelsen, Geir; Christoffersen, Terje; Arnstad, Ellen Dalen. (2020) Uveitis in Juvenile Idiopathic Arthritis 18-Year Outcome in the Population-based Nordic Cohort Study. Ophthalmology (Rochester, Minn.)
  Academic article
• Arnstad, Ellen Dalen; Iversen, Johanne Marie; Uglem, Martin; Glerup, Mia; Romundstad, Pål Richard; Sand, Trond. (2020) Pressure pain thresholds in young adults with juvenile idiopathic. Proceedings of the 26th European Paediatric Rheumatology Congress: Part 2. Virtual. 23 - 26 September 2020. . Pediatric Rheumatology
  Abstract
• Gårdvik, Kari Skulstad; Rygg, Marite; Torgersen, Terje; Lydersen, Stian; Indredavik, Marit Sæbø. (2020) Psychiatric morbidity, somatic comorbidity and substance use in an adolescent psychiatric population at 3-year follow-up. European Child and Adolescent Psychiatry
  Academic article
• Cetrelli, Lena Elisabet; Gil, Elisabeth Grut; Lundestad, Anette; Frid, Paula; Halbig, Josefine Mareile; Fischer, Johannes Maria. (2020) Serum Vitamin D and Caries in Juvenile Idiopathic Arthritis. . Journal of Dental Research
  Abstract
• Fischer, Johannes Maria; Skeie, Marit Slåttelid; Rosendahl, Karen; Tylleskär, Karin; Lie, Stein Atle; Shi, Xie-Qi. (2020) Prevalence of temporomandibular disorder in children and adolescents with juvenile idiopathic arthritis – a Norwegian cross- sectional multicentre study. BMC Oral Health
  Academic article
• Giancane, Gabriella; Swart, Joost Frans; Castagnola, E; Groll, Andreas; Horneff, Gerd; Huppertz, Hans-Iko. (2020) Opportunistic infections in immunosuppressed patients with juvenile idiopathic arthritis: analysis by the Pharmachild Safety Adjudication Committee. Arthritis Research & Therapy
  Academic article
• de Jesus, Adriana Almeida; Hou, Yangfeng; Brooks, Stephen; Malle, Louise; Biancotto, Angelique; Huang, Yan. (2020) Distinct interferon signatures and cytokine patterns define additional systemic autoinflammatory diseases. Journal of Clinical Investigation
  Academic article

2019

• Qvarnstrøm, Karin; Glerup, Mia; Rypdal, Veronika Gjertsen; Arnstad, Ellen Dalen; Peltoniemi, Suvi; Ekelund, Maria. (2019) AB0942 Radiological sacroiliitis after 18 years of follow-up in the population-based Nordic juvenile idiopathic arthritis (JIA) cohort. Annals of the Rheumatic Diseases
  Abstract
• Rypdal, Veronika Gjertsen; Guzman, Jaime; Henrey, A; Loughin, T; Glerup, Mia; Arnstad, Ellen Dalen. (2019) SAT0628 Validation of methods for predicting long-term outcome in juvenile idiopathic arthritis: Results for Canadian and Nordic prediction models in the Nordic cohort. . Annals of the Rheumatic Diseases
  Abstract
• Glerup, Mia; Thiel, Steffen; Rypdal, Veronika Gjertsen; Arnstad, Ellen Dalen; Ekelund, Maria; Peltoniemi, Suvi. (2019) Complement lectin pathway protein levels reflect disease activity in juvenile idiopathic arthritis: A longitudinal study of the Nordic JIA cohort. Pediatric Rheumatology
  Academic article
• Nordal, Ellen Berit; Rypdal, Veronika Gjertsen; Arnstad, Ellen Dalen; Aalto, Kristiina; Berntson, Lillemor; Ekelund, Maria. (2019) Participation in school and physical education in juvenile idiopathic arthritis in a Nordic long-term cohort study. Pediatric Rheumatology
  Academic article
• Rypdal, Veronika Gjertsen; Guzman, Jaime; Henrey, Andrew; Loughin, Thomas; Glerup, Mia; Arnstad, Ellen Dalen. (2019) Validation of prediction models of severe disease course and non-achievement of remission in juvenile idiopathic arthritis: part 1-results of the Canadian model in the Nordic cohort. Arthritis Research & Therapy
  Academic article
• Glerup, Mia; Rypdal, Veronika Gjertsen; Arnstad, Ellen Dalen; Ekelund, Maria; Peltoniemi, Suvi; Aalto, Kristiina. (2019) Long-term outcomes in juvenile idiopathic arthritis: 18 years of follow-up in the population-based Nordic Juvenile Idiopathic Arthritis (JIA) cohort. Arthritis care & research
  Academic article
• Hetlevik, Siri Opsahl; Flatø, Berit; Aaløkken, Trond Mogens; Samersaw-Lund, May Brit; Reiseter, Silje; Mynarek, Georg. (2019) Pulmonary manifestations and progression of lung disease in juvenile-onset mixed connective tissue disease. Journal of Rheumatology
  Academic article
• Nordal, Ellen Berit; Pistorio, A; Rygg, Marite; Giancane, Gabriella; Maghnie, Mohamed; Di Lorgi, Natascia. (2019) Growth and puberty in juvenile dermatomyositis: a longitudinal cohort study. . Arthritis care & research
  Academic article
• Krol, Roline; Swart, Joost Frans; Giancane, Gabriella; de Roock, Sytze; Herlin, T; Dolezalova, Pavla. (2019) OP0058 Development of inflammatory bowel disease during treatment with etanercept in patients with juvenile idiopathic arthritis. Annals of the Rheumatic Diseases
  Abstract
• Arnstad, Ellen Dalen; Glerup, Mia; Rypdal, Veronika Gjertsen; Peltoniemi, Suvi; Ekelund, Maria; Berntson, Lillemor. (2019) OP0201 Fatigue in Juvenile Idiopathic Arthritis after 18 years of follow-up. . Annals of the Rheumatic Diseases
  Abstract
• Skeie, Marit Slåttelid; Gil, Elisabeth Grut; Cetrelli, Lena Elisabet; Rosén, Annika; Fischer, Johannes Maria; Åstrøm, Anne Nordrehaug. (2019) Oral health in children and adolescents with juvenile idiopathic arthritis - a systematic review and meta-analysis. BMC Oral Health
  Academic literature review

2018

• Rypdal, Veronika Gjertsen; Arnstad, Ellen Dalen; Aalto, Kristiina; Berntson, Lillemor; Ekelund, Maria; Fasth, Anders. (2018) Predicting unfavorable long-term outcome in juvenile idiopathic arthritis: Results from the Nordic cohort study. Arthritis Research & Therapy
  Academic article
• Hinks, Anne; Marion, Miranda C.; Cobb, Joanna; Comeau, Mary E.; Sudman, Marc; Ainsworth, Hannah C.. (2018) Brief Report: The Genetic Profile of Rheumatoid Factor?Positive Polyarticular Juvenile Idiopathic Arthritis Resembles That of Adult Rheumatoid Arthritis. Arthritis & Rheumatology
  Academic article
• Arnstad, Ellen Dalen; Rypdal, Veronika Gjertsen; Peltoniemi, Suvi; Herlin, T; Berntson, Lillemor; Fasth, Anders. (2018) Early self-reported pain in juvenile idiopathic arthritis (JIA) is related to long-term outcomes. Results from the Nordic JIA cohort study. . Arthritis care & research
  Academic article
• Iversen, Johanne Marie; Uglem, Martin; Indredavik, Marit Sæbø; Romundstad, Pål Richard; Nilsen, Kristian Bernhard; Sand, Trond. (2018) Pain sensitivity and thermal detection thresholds in young adults born preterm with very low birth weight or small for gestational age at term compared with controls. Journal of Pain
  Academic article
• Flatø, Berit; Rygg, Marite; Nordal, Ellen Berit; Røisland, Mona; Ødegård, Hanne Beate; Hoftun, Gry Børmark. (2018) The Norwegian version of the Juvenile Arthritis Multidimensional Assessment Report (JAMAR). Rheumatology International
  Academic article
• Rypdal, Veronika Gjertsen; Glerup, Mia; Christoffersen, terje; Bertelsen, Geir; Arnstad, Ellen Dalen; Aalto, Kristiina. (2018) Long-term outcome and complications in uveitis, 17 years after disease onset in a population-based Nordic Juvenile Idiopathic arthritis cohort. Proceedings of the 25th European Paediatric Rheumatology Congress (PReS 2018), Lisbon, Portugal. . Pediatric Rheumatology
  Abstract
• Toplak, N; Uziel, Yosef; Khubchandani, Raju; Abinum, M.; Atsali, Erato; Bolt, Ineke. (2018) Challenges in achieving consensus for vaccination with live attenuated vaccines in children with rheumatological disease — the variability of vaccination practices across the globe. Proceedings of the 25th European Paediatric Rheumatology Congress (PReS 2018), Lisbon, Portugal. 5-8 September 2018. Pediatric Rheumatology
  Abstract
• Nordal, Ellen Berit; Consolaro, Alessandro; Rygg, Marite; Rumba-Rozenfelde, I; Shafaie, N.; Avcin, Tadej. (2018) Discordances between the parent global assessment of disease activity and global assessment of general well-being in a multinational cohort of 9137 children with juvenile idiopathic arthritis. Proceedings of the 25th European Paediatric Rheumatology Congress (PReS 2018). Pediatric Rheumatology
  Abstract
• Glerup, Mia; Rypdal, Veronika Gjertsen; Arnstad, Ellen Dalen; Ekelund, Maria; Peltoniemi, Suvi; Aalto, Kristiina. (2018) Remission status after 18 years of follow-up in the population-based Nordic Juvenile Idiopathic Arthritis (JIA) cohort. Proceedings of the 25th European Paediatric Rheumatology Congress (PReS 2018), Lisbon, Portugal. 5-8 September 2018. Pediatric Rheumatology
  Abstract
• Røisland, Mona; Rygg, Marite; Nordal, Ellen Berit; Selvaag, Anne Marit. (2018) Agreement between JIA patients and parents on disease perception analyzed by the Norwegian version of the JAMAR questionnaire. . Annals of the Rheumatic Diseases
  Abstract

2017

• Alberdi-Saugstrup, Mikel; Zak, Marek; Nielsen, Susan; Herlin, Troels; Nordal, Ellen Berit; Berntson, Lillemor. (2017) High-sensitive CRP as a predictive marker of long-term outcome in juvenile idiopathic arthritis. Rheumatology International
  Academic article
• Hinks, A; Bowes, J; Cobb, J; Ainsworth, HC; Marion, MC; Comeau, ME. (2017) Fine-mapping the MHC locus in juvenile idiopathic arthritis (JIA) reveals genetic heterogeneity corresponding to distinct adult inflammatory arthritic diseases. Annals of the Rheumatic Diseases
  Academic article
• Nordal, Ellen Berit; Rypdal, Veronika Gjertsen; Christoffersen, Terje; Aalto, Kristiina; Berntson, Lillemor; Fasth, Anders. (2017) Incidence and predictors of Uveitis in juvenile idiopathic arthritis in a Nordic long-term cohort study. Pediatric Rheumatology
  Academic article
• Ekelund, Maria; Aalto, Kristiina; Fasth, Anders; Herlin, Troels; Nielsen, Susan; Nordal, Ellen Berit. (2017) Psoriasis and associated variables in classification and outcome of juvenile idiopathic arthritis - an eight-year follow-up study. Pediatric Rheumatology
  Academic article
• Alberdi-Saugstrup, Mikel; Enevold, Christian; Zak, M; Nielsen, S; Nordal, Ellen Berit; Berntson, L. (2017) Non-HLA gene polymorphisms in juvenile idiopathic arthritis: associations with disease outcome. Scandinavian Journal of Rheumatology
  Academic article
• Hoftun, Gry Børmark; Romundstad, Pål Richard; Rygg, Marite; Kløven, Barbro. (2017) Relationship between pubertal timing and chronic nonspecific pain in adolescent girls: The Young-HUNT3 study (2006-2008). Pain
  Academic article
• Iversen, Johanne Marie; Indredavik, Marit Sæbø; Evensen, Kari Anne Indredavik; Romundstad, Pål Richard; Rygg, Marite. (2017) Self-reported chronic pain in young adults with a low birth weight. The Clinical Journal of Pain
  Academic article
• Frid, Paula Hanna Therese; Nordal, Ellen Berit; Bovis, Francesca; Giancane, Gabriella; Larheim, Tore Arne; Rygg, Marite. (2017) Temporomandibular Joint Involvement in Association With Quality of Life, Disability, and High Disease Activity in Juvenile Idiopathic Arthritis. Arthritis care & research
  Academic article
• Nordal, Ellen Berit; Pistorio, Angela; Rygg, Marite; Giancane, Gabriella; Hofer, Michael; Melo-Gomes, Jose. (2017) Growth and puberty in juvenile dermatomyositis, a longitudinal multicenter PRINTO study. Pediatric Rheumatology
  Abstract
• Arnstad, Ellen Dalen; Rypdal, Veronika Gjertsen; Peltoniemi, Suvi; Nordal, Ellen Berit; Berntson, Lillemor; Aalto, Kristiina. (2017) Early pain report in oligoarticular juvenile idiopathic arthritis is related to long-term outcome. Pediatric Rheumatology
  Abstract
• Consolaro, A; van Dijkhuizen, E. P.; Espada, Graciela; Varbanova, B.; Oliveira, S.K.; Miettunen, Päivi. (2017) Development of new JADAS and cJADAS cut-offs for disease activity states in oligoarthritis and RF-negative polyarthritis from a large multinational cohort of children with juvenile idiopathic arthritis. Pediatric Rheumatology
  Abstract
• Rypdal, Veronika Gjertsen; Arnstad, Ellen Dalen; Berntson, Lillemor; Zak, Marek; Aalto, Kristiina; Peltoniemi, Suvi. (2017) Baseline predictors of functional disability eight years after disease onset in the Nordic juvenile idiopathic arthritis population-based cohort. Pediatric Rheumatology
  Abstract
• Angenete, Oskar W; Augdal, Thomas Angell; Jellestad, Stig; Rygg, Marite; Rosendahl, Karen. (2017) Normal magnetic resonance appearances of the temporomandibular joints in children and young adults aged 2–18 years. Pediatric Radiology
  Academic article

2016

• Hetlevik, Siri Opsahl; Flatø, Berit; Rygg, Marite; Nordal, Ellen Berit; Brunborg, Cathrine; Hetland, Helene. (2016) Long-term outcome in juvenile-onset mixed connective tissue disease: a nationwide Norwegian study. Annals of the Rheumatic Diseases
  Academic article

2015

• Esbjörnsson, Anna-Clara; Aalto, Kristiina; Broström, Eva Weidenhielm; Fasth, Anders; Herlin, Troels; Nielsen, Susan. (2015) Ankle arthritis predicts polyarticular disease course and unfavourable outcome in children with juvenile idiopathic arthritis. Clinical and Experimental Rheumatology
  Academic article
• Rygg, Marite. (2015) HVORDAN GÅR DET MED BARN MED REVMATISK SYKDOM SOM VOKSNE?. BestPractice Norge
  Popular scientific article
• Hetlevik, Siri Opsahl; Flatø, Berit; Nordal, Ellen Berit; Rygg, Marite; Lilleby, Vibke. (2015) Long term outcome and clinical characteristics in childhood-onset mixed connective tissue disease – a Norwegian nationwide study. Annual European Congress of Rheumatology, Fiera di Roma, Rome, Italy, 10 - 13 June 2015. Annals of the Rheumatic Diseases
  Abstract
• Arnstad, Ellen Dalen; Nordal, Ellen Berit; Berntson, Lillemor; Aalto, Kristiina; Fasth, Anders; Herlin, T. (2015) Self-reported pain 6 months after onset of juvenile idiopathic arthritis is related to pain score and disease outcome after 8 years. Annual European Congress of Rheumatology, Fiera di Roma, Rome, Italy, 10 - 13 June 2015,. Annals of the Rheumatic Diseases
  Abstract
• Hinks, Anne; Cobb, Joanna; Bowes, J; Han, B; Ainsworth, H; Marion, Miranda. (2015) Analysis of the MHC region in a large cohort of juvenile idiopathic arthritis cases identifies independent effects at HLA-DRB1 for the most common subtypes of JIA. Annual European Congress of Rheumatology, Fiera di Roma, Rome, Italy, 10 - 13 June 2015. Annals of the Rheumatic Diseases
  Abstract
• Nordal, Ellen Berit; Berntson, Lillemor; Zak, Marek; Aalto, Kristiina; Peltoniemi, Suvi; Nielsen, Susan. (2015) High participation in school and physical education in children in a Nordic Juvenile Idiopathic Arthritis (JIA) cohort. Annual European Congress of Rheumatology, Fiera di Roma, Rome, Italy, 10 - 13 June 2015. Annals of the Rheumatic Diseases
  Abstract
• Moncrieffe, H; Lele, A; Shams, K. A.; Levy, B; Marion, Miranda C; Sudman, Marc. (2015) Fine mapping of the CHR 22q13.1 juvenile idiopathic arthritis risk locus. Annual European Congress of Rheumatology, Fiera di Roma, Rome, Italy, 10 - 13 June 2015. Annals of the Rheumatic Diseases
  Abstract
• Iversen, Johanne Marie; Hoftun, Gry Børmark; Romundstad, Pål Richard; Rygg, Marite. (2015) Adolescent chronic pain and association to perinatal factors: Linkage of Birth Registry data with the Young-HUNT Study. European Journal of Pain
  Academic article

2014

• Iversen, Johanne Marie; Arnstad, Ellen Dalen; Sand, Trond; Rygg, Marite. (2014) Neurophysiologic pain response in patients with juvenlie idiopathic arthritis - a pilot study. Pediatric Rheumatology
  Abstract
• Peltoniemi, Suvi; Nordal, Ellen Berit; Berntson, Lillemor; Rygg, Marite; Fasth, Anders; Herlin, T. (2014) Prognostic factors for the disease course and 8-year outcome in Nordic children with oligoarticular-onset juvenile idiopathic arthritis. Pediatric Rheumatology
  Abstract
• Nordal, Ellen Berit; Berntson, Lillemor; Aalto, Kristiina; Fasth, Anders; Herlin, T; Nielsen, Susan. (2014) Histone antibodies as a biomarker of uveitis in JIA. Pediatric Rheumatology
  Abstract
• Esbjørnsson, Anna-Clara; Aalto, Kristiina; Brostrøm, Eva W; Fasth, Anders; Herlin, T; Nielsen, Susan. (2014) Ankle arthritis predicts worse outcome in children with juvenile idiopathic arthritis. Pediatric Rheumatology
  Abstract
• Berntson, Lillemor; Nordal, Ellen Berit; Fasth, Anders; Aalto, Kristiina; Herlin, T; Nielsen, Susan. (2014) Anti-type II collagen antibodies, anti-CCP, IgA RF and IgM RF are associated with joint damage, assessed eight years after onset of juvenile idiopathic arthritis (JIA). Pediatric Rheumatology
  Academic article
• Alberdi-Saugstrup, Mikel; Berntson, Lillemor; Enevold, Christian; Fasth, Anders; Nielsen, Susan M.; Nordal, Ellen Berit. (2014) Non-HLA genepolymorphisms in juvenile chronic arthritis: Associations with outcome of disease. Pediatric Rheumatology
  Abstract

2013

• Nordal, Ellen Berit; Berntson, Lillemor; Aalto, Kristiina; Peltoniemi, Suvi; Nielsen, Susan; Herlin, T. (2013) Uveitis in the Nordic juvenile idiopathic arthritis cohort; high incidence, frequent complications, and gender-associated risk factors. Pediatric Rheumatology
  Abstract
• Elsaman, Ahmed M.; Radwan, Ahmed R.; Akmatov, Manas K; Della Beffa, Cristina; Walker, Alisha; Mayer, Christian T.. (2013) Amyloid arthropathy associated with multiple myeloma: A systematic analysis of 101 reported cases. Seminars in Arthritis & Rheumatism
  Academic literature review
• Hoftun, Gry Børmark; Romundstad, Pål Richard; Rygg, Marite. (2013) Association of Parental Chronic Pain With Chronic Pain in the Adolescent and Young Adult Family Linkage Data From the HUNT Study. JAMA pediatrics
  Academic article
• Bemtson, Lillemor; Nordal, Ellen Berit; Aalto, Kristiina; Peltoniemi, Suvi; Herlin, Troels; Zak, Marek. (2013) HLA-B27 Predicts a More Chronic Disease Course in an 8-year Followup Cohort of Patients with Juvenile Idiopathic Arthritis. Journal of Rheumatology
  Academic article

2012

• Rygg, Marite; Pistorio, Angela; Ravelli, Angelo; Maghnie, M; Di Iorgi, N; Bader-Meunier, B. (2012) A longitudinal PRINTO study on growth and puberty in juvenile systemic lupus erythematosus. Annals of the Rheumatic Diseases
  Academic article
• Nordal, Ellen Berit; Zak, M; Aalto, K; Berntson, L; Fasth, A; Herlin, T. (2012) Validity and predictive ability of the juvenile arthritis disease activity score based on CRP versus ESR in a Nordic population-based setting. Annals of the Rheumatic Diseases
  Academic article
• Rygg, Marite. (2012) Barn med Lupus får forsinket pubertet. Dagens medisin
  Short communication
• Hoftun, Gry Børmark; Romundstad, Pål Richard; Rygg, Marite. (2012) Factors Associated With Adolescent Chronic Non-Specific Pain, Chronic Multisite Pain, and Chronic Pain With High Disability: The Young-HUNT Study 2008. Journal of Pain
  Academic article

2011

• Hoftun, Gry Børmark; Romundstad, Pål Richard; Zwart, John-Anker; Rygg, Marite. (2011) Chronic idiopathic pain in adolescence - high prevalence and disability: The young HUNT study 2008. Pain
  Academic article
• Nordal, Ellen Berit; Songstad, Nils Thomas; Rygg, Marite. (2011) Difficulties in defining antinuclear antibody-positive patients as a separate category in the classification of juvenile idiopathic arthritis: comment on the article by Ravelli et al. Arthritis and Rheumatism
  Reader opinion piece
• Nordal, Ellen Berit; Zak, Marek; Berntson, Lillemor; Aalto, Kristiina; Peltoniemi, Suvi; Nielsen, Susan. (2011) Validation of the Juvenile Arthritis Disease Activity Score (JADAS) based on C-reactive protein in a population-based Nordic cohort of juvenile idiopathic arthritis. Clinical and Experimental Rheumatology
  Abstract
• Nordal, Ellen Berit; Zak, Marek; Berntson, Lillemor; Aalto, Kristiina; Lahdenne, Pekka; Peltoniemi, Suvi. (2011) Juvenile Arthritis Disease Activity Score (JADAS) based on CRP; Validity and predictive ability in a Nordic population-based setting. Pediatric Rheumatology
  Abstract
• Nordal, Ellen Berit; Zak, Marek; Berntson, Lillemor; Aalto, Kristiina; Peltoniemi, Suvi; Nielsen, Susan. (2011) Ongoing disease-activity in a majority of children in a Nordic Juvenile Idiopathic Arthritis (JIA) cohort. Clinical and Experimental Rheumatology
  Abstract
• Rygg, Marite; Pistorio, Angela; Ravelli, Angelo; Maghnie, M; Di Iorgi, N; Demirkaya, Erkan. (2011) Longitudinal study on Growth Failure and Height Deflection in Juvenile Systemic Lupus Erythematosus (JSLE): The Result of a Prospective Multicentre PRINTO Study. Clinical and Experimental Rheumatology
  Abstract
• Nordal, Ellen Berit; Zak, Marek; Aalto, Kristiina; Berntson, Lillemor; Fasth, Anders; Herlin, T. (2011) Ongoing Disease Activity and Changing Categories in a Long-Term Nordic Cohort Study of Juvenile Idiopathic Arthritis. Arthritis and Rheumatism
  Academic article

2010

• Nordal, Ellen Berit; Zak, M; Berntson, L; Aalto, K; Peltoniemi, S; Nielsen, S. (2010) DISEASE CHARACTERISTICS AND MEDICATION DURING THE FIRST EIGHT YEARS AFTER DISEASE ONSET IN A NORDIC JUVENILE IDIOPATHIC ARTHRITIS (JIA) COHORT. Scandinavian Journal of Rheumatology
  Abstract
• Saad-Magalhaes, C; Pistorio, A; Ravelli, A; Filocamo, G; Viola, S; Brik, R. (2010) Does removal of aids/devices and help make a difference in the Childhood Health Assessment Questionnaire disability index?. Annals of the Rheumatic Diseases
  Academic article

2009

• Bergseng, Håkon; Afset, Jan Egil; Radtke, Andreas; Løseth, Kirsti; Lyng, Randi V; Rygg, Marite. (2009) Molecular and phenotypic characterization of invasive group B streptococcus strains from infants in Norway 2006-2007. Clinical Microbiology and Infection (CMI)
  Academic article
• Nordal, Ellen Berit; Songstad, Nils Thomas; Berntson, L; Berntson, Lillemor; Moen, T; Moen, T. (2009) Biomarkers of Chronic Uveitis in Juvenile Idiopathic Arthritis: Predictive Value of Antihistone Antibodies and Antinuclear Antibodies. Journal of Rheumatology
  Academic article

2008

• Nordal, Ellen Berit; Songstad, Nils Thomas; Straume, Bjørn; Berntson, Lillemor; Rygg, Marite. (2008) May antihistone antibodies replace antinuclear antibodies (ANA) as a predictor of uveitis in Juvenile idiopathic arthritis?. Pediatric Rheumatology
  Abstract
• Berntson, Lillemor; Damgard, Michael; Andersson-Gäre, Boel; Herlin, T; Nielsen, Susan; Nordal, Ellen Berit. (2008) HLA-B27 predicts a more extended disease with increasing age at onset in boys with juvenile idiopathic arthritis. Pediatric Rheumatology
  Abstract
• Filocamo, G; Saad-Magalhaes, C; Pistorio, A; Ravelli, A; Brik, R; Mihaylova, D. (2008) Does incorporation of aids/devices and help make a difference in the childhood health assessment questionnaire disability index? Analysis from the Printo juvenile idiopathic arthritis database. Pediatric Rheumatology
  Abstract
• Hafström, Maria; Kristoffersen, Laila; Grunewaldt, Kristina Hermansen; Rygg, Marite. (2008) Non-nutritive sucking in preterm infant with cerebral pathology. Archives of Disease in Childhood
  Abstract
• Bergseng, Håkon; Rygg, Marite; Bevanger, Lars Solbu; Bergh, Kåre. (2008) Invasive group B streptococcus (GBS) disease in Norway 1996-2006. European Journal of Clinical Microbiology and Infectious Diseases
  Academic article
• Berntson, Lillemor; Damgård, Michael; Andersson-Gäre, Boel; Andersson-Gare, Boel; Herlin, Troels; Nielsen, Susan. (2008) HLA-B27 predicts a more extended disease with increasing age at onset in boys with juvenile idiopathic arthritis. Journal of Rheumatology
  Academic article

2007

• Adde, Lars; Rygg, Marite; Lossius, K; Øberg, gunn kristin; Støen, R. (2007) General movement assessment: Predicting cerebral palsy in clinical practise. Early Human Development
  Academic article
• Myhre, Arne Kristian; Rygg, Marite; Borgen, Geir; Konsmo, Karina. (2007) Münchausen by Proxy (MBP), Pediatric Condition Falsification (PCF).
  Academic chapter/article/Conference paper
• Songstad, Nils Thomas; Rygg, Marite. (2007) Akutt reumatisk feber og poststreptokokk artritt.
  Academic chapter/article/Conference paper
• Rygg, Marite. (2007) Akutt sosialpediatri. Generelle retningslinjer.
  Academic chapter/article/Conference paper
• Kittang, Ole Bjørn; Rygg, Marite. (2007) Erythema multiforme, Stevens-Johnson syndrom, Toksisk epidermal nekrolyse.
  Academic chapter/article/Conference paper
• Stålen, Else B.; Rygg, Marite. (2007) Suicidalforsøk.
  Academic chapter/article/Conference paper
• Michalsen, Helge; Rygg, Marite. (2007) Akutt sosialpediatri - Noen juridiske aspekter.
  Academic chapter/article/Conference paper
• Bergseng, Håkon; Bevanger, Lars Solbu; Rygg, Marite; Bergh, Kåre. (2007) Real-time PCR targeting the sip gene for detection of group B streptococcus colonization in pregnant women at delivery. Journal of Medical Microbiology
  Academic article
• Berntson, Lillemor; Wernroth, Lisa; Fasth, Anders; Aalto, Kristiina; Herlin, T; Nielsen, Susan. (2007) Assessment of disease activity in juvenile idiopathic arthritis. The number and the size of joints matter. Journal of Rheumatology
  Academic article

2006

• Rygg, Marite. (2006) Vaksineskepsis - profylaksearbeidets paradoks. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Editorial

2005

• Moe, Nina; Lien, Espen; Johnsen, Lars Ingvald; Rygg, Marite. (2005) Neuromyelitis optica in a six year-old girl. Clinical and Experimental Rheumatology
  Abstract

2003

• Berntson, Lillemor; Andersson-Gare, Boel; Fasth, Anders; Herlin, T; Kristinsson, Jon; Lahdenne, Pekka. (2003) Incidence of juvenile idiopathic arthritis in the Nordic countries. A population based study with special reference to the validity of the ILAR and EULAR criteria. Journal of Rheumatology
  Academic article
• Nyrnes, Siri Ann; Rygg, Marite. (2003) PULMONARY HEMORRHAGE IN JUVENILE SJOGREN/SLE OVERLAP SYNDROME. Clinical and Experimental Rheumatology
  Abstract

2002

• Berntson, Lillemor; Fasth, Anders; Andersson-Gare, Boel; Herlin, T; Kristinsson, Jon; Lahdenne, Pekka. (2002) The influence of heredity for psoriasis on the ILAR classification of juvenile idiopathic arthritis. Journal of Rheumatology
  Academic article

2001

• Rygg, M; Uhlar, CM; Thorn, C; Jensen, LE; Gaughan, DJ; Varley, AW. (2001) In vitro evaluation of an enhanced human serum amyloid A (SAA2) promoter-regulated soluble TNF receptor fusion protein for anti-inflammatory gene therapy. Scandinavian Journal of Immunology
  Academic article
• Selvaag, AM; Ruperto, N; Asplin, L; Rygg, Marite; Landgraf, JM; Førre, Ø. (2001) The Norwegian version of the Childhood Health Assessment Questionnaire (CHAQ) and the Child Health Questionnaire (CHQ). Clinical and Experimental Rheumatology
  Academic article