2026

• Espnes, Ketil Arne; Spigset, Olav; Bratt, Guro Emilie; Tilrem, Marit; Hamnes, Sarita; Skogvoll, Eirik; Skråstad, Ragnhild Bergene. (2026) Association Between Levels of the Acute Phase Proteins Alpha-1-Acid Glycoprotein and C-Reactive Protein and Serum Concentrations of Clozapine: A Study of 1106 Therapeutic Drug Monitoring Samples. Basic & Clinical Pharmacology & Toxicology
  Academic article
• Holmvik, Simon; Sokołowski, Daniel Radosław; Skråstad, Ragnhild Bergene; Spigset, Olav; Strand, Bjørn Heine; Håberg, Asta. (2026) Subjective Memory Impairment in the General Adult Population: Associations With Early‐Life Cognition, Concurrent Objective Memory, Dementia Risk Factors. European Journal of Neurology
  Academic article

2025

• Skråstad, Ragnhild Bergene; Salvesen, Øyvind Olav; Andreassen, Trine Naalsund; Aamo, Trond Oskar; Hveem, Kristian; Krokstad, Steinar; Spigset, Olav. (2025) Impact of Sex, Age, Body Composition and Kidney Function on the Relationship Between Self-Reported Alcohol Consumption and Phosphatidylethanol—Data From the HUNT Study. Basic & Clinical Pharmacology & Toxicology
  Academic article
• Seferowicz, Maria; Lerdal, Anners; Edvardsen, Hilde Marie Erøy; Skråstad, Ragnhild Bergene; Valeur, Jørgen; Jørgenrud, Benedicte Marie; Nyman, Anna Armika Tussilago; Bogstrand, Stig Tore. (2025) Unveiling stages of change among medical inpatients with an increased-risk alcohol consumption—a cross-sectional study. Alcohol and Alcoholism
  Academic article
• Tevik, Kjerstin Elisabeth; Skråstad, Ragnhild Bergene; Benth, Jurate Saltyte; Selbæk, Geir; Bergh, Sverre; Spigset, Olav; Krokstad, Steinar; Helvik, Anne-Sofie. (2025) Trends in alcohol consumption in middle-aged and older adults, assessed with self-report and the alcohol marker phosphatidylethanol – A longitudinal HUNT study. PLOS ONE
  Academic article
• Andreassen, Trine Naalsund; Gule, Marina; Havnen, Hilde; Spigset, Olav; Skråstad, Ragnhild Bergene. (2025) A validated method for capillary phosphatidylethanol 16:0/18:1 quantification with two different 10-µl volumetric absorptive microsample devices in the same setup. Journal of Analytical Toxicology
  Academic article
• Finanger, Trine; Skråstad, Ragnhild Bergene; Appleton, Catherine Amelia; Hagemann, Cecilie Therese. (2025) Facilitating gynecological examination and long acting reversible contraception for women with substance use disorder: a prospective cohort study. BMC Women's Health
  Academic article

2024

• Helland, Arne; Muller, Sébastien; Spigset, Olav; Krabseth, Hege-Merete; Hansen, Miriam; Skråstad, Ragnhild Bergene. (2024) Drug detection in oral fluid and urine after single therapeutic doses of dexamphetamine, lisdexamphetamine, and methylphenidate in healthy volunteers. Journal of Analytical Toxicology
  Academic article
• Tevik, Kjerstin Elisabeth; Skråstad, Ragnhild Bergene; Benth, Jurate Saltyte; Selbæk, Geir; Bergh, Sverre; Eldholm, Rannveig Sakshaug; Krokstad, Steinar; Helvik, Anne-Sofie. (2024) Prevalence and change in alcohol consumption in older adults over time, assessed with self-report and Phosphatidylethanol 16:0/18:1 —The HUNT Study. PLOS ONE
  Academic article
• Jarmund, Anders Hagen; Svoren, Åse Turid Rossevatn; Skråstad, Ragnhild Bergene; Austdal, Marie; Tangerås, Line Haugstad; Salvesen, Kjell Åsmund Blix; Iversen, Ann-Charlotte. (2024) First trimester combined preeclampsia screening and immune profiling reveal novel specific risk groups for hypertensive pregnancy disorders. Placenta
  Conference abstract
• Svoren, Åse Turid Rossevatn; Jarmund, Anders Hagen; Skråstad, Ragnhild Bergene; Austdal, Marie; Tangerås, Line Haugstad; Salvesen, Kjell Åsmund Blix; Iversen, Ann-Charlotte. (2024) Immunprofilering avdekker tre ulike sykdomsgrupper ved kalkulert høy risiko for preeklampsi i første trimester. Gynekologen
  Conference abstract
• Finanger, Trine; Melby, Katrine; Spigset, Olav; Andreassen, Trine Naalsund; Lydersen, Stian; Skråstad, Ragnhild Bergene. (2024) Relationship between alcohol intake based on daily smartphone-reported consumption and PEth concentrations in healthy volunteers. Alcohol and Alcoholism
  Academic article

2023

• Skråstad, Ragnhild Bergene; Aamo, Trond Oskar; Andreassen, Trine Naalsund; Havnen, Hilde; Hveem, Kristian; Krokstad, Steinar; Salvesen, Øyvind Olav; Spigset, Olav. (2023) Quantifying Alcohol Consumption in the General Population by Analysing Phosphatidylethanol Concentrations in Whole Blood: Results from 24,574 Subjects Included in the HUNT4 Study. Alcohol and Alcoholism
  Academic article
• Skråstad, Ragnhild Bergene; Aamo, Trond Oskar; Andreassen, Trine Naalsund; Havnen, Hilde; Hveem, Kristian; Krokstad, Steinar; Salvesen, Øyvind Olav; Spigset, Olav. (2023) Response to letter to editor for 'Quantifying alcohol consumption in the general population by analyzing phosphatidylethanol concentrations in whole blood: Results from 24 574 subjects included in the HUNT4 study'. Alcohol and Alcoholism
  Commentary

2022

• Finanger, Trine; Vaaler, Arne; Spigset, Olav; Aamo, Trond Oskar; Andreassen, Trine Naalsund; Gråwe, Rolf W.; Skråstad, Ragnhild Bergene. (2022) Identification of unhealthy alcohol use by self-report and phosphatidylethanol (PEth) blood concentrations in an acute psychiatric department. BMC Psychiatry
  Academic article
• Allotey, John; Whittle, Richard; Snell, KIE; Smuk, M; Townsend, RR; Dadelszen, P von; Heazell, AEP; Magee, L; Smith, GCS; Sandall, J. (2022) External validation of prognostic models to predict stillbirth using International Prediction of Pregnancy Complications (IPPIC) Network database: individual participant data meta-analysis. Ultrasound in Obstetrics and Gynecology
  Academic literature review
• Sheikh, Jameela; Allotey, John; Kew, Tania; Fernández-Félix, Borja M.; Zamora, Javier; Khalil, Asma; Eskild, Anne; Haavaldsen, Camilla; Magnus, Per Minor; Salvesen, Kjell Å. (2022) Effects of race and ethnicity on perinatal outcomes in high-income and upper-middle-income countries: an individual participant data meta-analysis of 2 198 655 pregnancies. The Lancet
  Academic literature review

2021

• Allotey, J; Whittle, Richard; Snell, KIE; Smuk, M; Townsend, RR; Dadelszen, P von; Heazell, A. E. P.; Magee, L; Smith, GCS; Sandall, J. (2021) External validation of prognostic models to predict stillbirth using the International Prediction of Pregnancy Complications (IPPIC) Network database: an individual participant data meta-analysis. Ultrasound in Obstetrics and Gynecology
  Academic article
• Finanger, Trine; Spigset, Olav; Gråwe, Rolf W.; Andreassen, Trine Naalsund; Løkken, Trine Nordgård; Aamo, Trond Oskar; Bratt, Guro Emilie; Tømmervik, Kristin; Langaas, Vibeke Stenhaug; Finserås, Kristin. (2021) Phosphatidylethanol as blood biomarker of alcohol consumption in early pregnancy: An observational study in 4067 pregnant women. Alcoholism: Clinical and Experimental Research
  Academic article

2020

• Snell, Kym I.E.; Allotey, John; Smuk, Melanie; Hooper, Richard; Chan, Claire; Ahmed, Asif; Chappell, Lucy C.; Dadelszen, Peter Von; Green, Marcus; Kenny, Louise. (2020) External validation of prognostic models predicting pre-eclampsia: individual participant data meta-analysis. BMC Medicine
  Academic article
• Allotey, John; Snell, Kym I.E.; Smuk, Melanie; Hooper, Richard; Chan, Claire; Ahmed, Asif; Chappell, Lucy C.; Dadelszen, Peter von; Dodds, Julie; Green, Marcus. (2020) Validation and development of models using clinical, biochemical and ultrasound markers for predicting pre-eclampsia: an individual participant data meta-analysis. Health Technology Assessment
  Academic article
• Skråstad, Ragnhild Bergene; Spigset, Olav; Aamo, Trond Oskar; Andreassen, Trine Naalsund. (2020) Stability of Phosphatidylethanol 16:0/18:1 in Freshly Drawn, Authentic Samples from Healthy Volunteers. Journal of Analytical Toxicology
  Academic article

2019

• Frost, Joachim; Bernard, Jean-Paul Anthony; Dietrichs, Erik Sveberg; Kjeldstadli, Kari Grandaunet; Riedel, Bettina; Skråstad, Ragnhild Bergene; Vevelstad, Merete; Helland, Arne. (2019) Nye anbefalinger ved serumkonsentrasjonsmålinger av sentralstimulerende legemidler. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Commentary

2018

• Velle-Forbord, Veronica; Skråstad, Ragnhild Bergene; Salvesen, Øyvind; Kramer, Michael S.; Morken, Nils-Halvdan; Vanky, Eszter. (2018) Breastfeeding and long‐term maternal metabolic health in the HUNT Study: a longitudinal population‐based cohort study. BJOG: An International Journal of Obstetrics and Gynaecology
  Academic article
• Tangerås, Line Haugstad; Silva, Gabriela; Stødle, Guro; Gierman, Lobke; Skei, Bente; Collett, Karin; Beversmark, Anne Lise; Skråstad, Ragnhild Bergene; Thomsen, Liv Cecilie Vestrheim; Bjørge, Line. (2018) Placental inflammation by HMGB1 activation of TLR4 at the syncytium. Placenta
  Academic article

2017

• Andreassen, Trine Naalsund; Havnen, Hilde; Spigset, Olav; Falch, Berit Margrethe Hasle; Skråstad, Ragnhild Bergene. (2017) Hight throughput UHPC-MSMS method for the analysis of phosphatidylethanol (PEth) 16:0/18:1, a specific biomarker for alcohol consumption, in whole blood. Journal of Analytical Toxicology
  Academic article

2016

• Roland, Pål-Didrik Hoff; Skråstad, Ragnhild. (2016) Foretrukne smertestillende legemidler til ammende. Norsk Farmaceutisk Tidsskrift (NFT)
  Academic literature review
• Aakerøy, Rachel; Skråstad, Ragnhild; Helland, Arne; Hilberg, Thor; Aamo, Trond Oskar; Dyrkorn, Roar; Spigset, Olav. (2016) Nye markører for påvisning av alkoholbruk. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article

2015

• Austdal, Marie; Tangerås, Line Haugstad; Skråstad, Ragnhild; Salvesen, Kjell Å; Austgulen, Rigmor; Iversen, Ann-Charlotte; Bathen, Tone Frost. (2015) First Trimester Urine and Serum Metabolomics for Prediction of Preeclampsia and Gestational Hypertension: A Prospective Screening Study. International Journal of Molecular Sciences
  Academic article
• Skråstad, Ragnhild; Hov, Gunhild Garmo; Blaas, Harm-Gerd Karl; Romundstad, Pål Richard; Salvesen, Kjell Å. (2015) Risk assessment for preeclampsia in nulliparous women at 11 to 13 weeks gestational age: prospective evaluation of two algorithms. BJOG: An International Journal of Obstetrics and Gynaecology
  Academic article
• Skråstad, Ragnhild; Blaas, Harm-Gerd Karl; Salvesen, Kjell Å. (2015) Screening for placental dysfunction: The detection of fetal growth restriction and prediction of hypertensive disorders of pregnancy with ultrasound and biochemical markers. Norges teknisk-naturvitenskapelige universitet
  Doctoral thesis
• Tangerås, Line Haugstad; Austdal, Marie; Skråstad, Ragnhild; Salvesen, Kjell Å; Austgulen, Rigmor; Bathen, Tone Frost; Iversen, Ann-Charlotte. (2015) Distinct First Trimester Cytokine Profiles for Gestational Hypertension and Preeclampsia. Arteriosclerosis, Thrombosis and Vascular Biology
  Academic article
• Tangerås, Line Haugstad; Stødle, Guro; Silva, Gabriela; Thomsen, Liv Cecilie Vestrheim; Gierman, Lobke; Skei, Bente; Collett, Karin; Myklebost, Merete; Beversmark, Anne Lise; Skråstad, Ragnhild. (2015) The inflammatory role of HMGB1 in preeclampsia. Pregnancy Hypertension
  Conference abstract
• Austdal, Marie; Tangerås, Line Haugstad; Skråstad, Ragnhild; Salvesen, Kjell Å; Austgulen, Rigmor; Bathen, Tone Frost; Iversen, Ann-Charlotte. (2015) First trimester urine and serum metabolomics to predict preeclampsia and gestational hypertension. Pregnancy Hypertension
  Conference abstract

2014

• Skråstad, Ragnhild; Hov, Gunhild Garmo; Blaas, Harm-Gerd Karl; Romundstad, Pål Richard; Salvesen, Kjell Å. (2014) A prospective study of screening for hypertensive disorders of pregnancy at 11–13 weeks in a Scandinavian population. Acta Obstetricia et Gynecologica Scandinavica
  Academic article
• Skråstad, Ragnhild Bergene; Hov, Gunhild Garmo; Blaas, Harm-Gerd Karl; Romundstad, Pål Richard; Salvesen, Kjell Å. (2014) OC10.01: A prospective study of screening for hypertensive disorders of pregnancy at 11 to 13 weeks. Ultrasound in Obstetrics and Gynecology
  Conference abstract
• Austdal, Marie; Skråstad, Ragnhild; Gundersen, Astrid; Austgulen, Rigmor; Iversen, Ann-Charlotte; Bathen, Tone Frost. (2014) Metabolomic biomarkers in serum and urine in women with preeclampsia. PLOS ONE
  Academic article
• Skråstad, Ragnhild Bergene; Hov, Gunhild Garmo; Blaas, Harm-Gerd Karl; Romundstad, Pål Richard; Salvesen, Kjell Å. (2014) OP12.01: Risk assessment for pre-eclampsia in nulliparous women at 11 to 13 weeks gestational age: evaluation of two algorithms. Ultrasound in Obstetrics and Gynecology
  Conference abstract

2013

• Austdal, Marie; Skråstad, Ragnhild; Gundersen, Astrid; Austgulen, Rigmor; Bathen, Tone Frost; Iversen, Ann-Charlotte. (2013) Metabolomic biomarkers in serum and urine of preeclamptic women. Pregnancy Hypertension
  Conference abstract
• Skråstad, Ragnhild; Eik-Nes, Sturla; Sviggum, Oddvar; Johansen, Ole Jakob; Salvesen, Kjell Å.; Romundstad, Pål Richard; Blaas, Harm-Gerd Karl. (2013) A randomized controlled trial of third-trimester routine ultrasound in a non-selected population. Acta Obstetricia et Gynecologica Scandinavica
  Academic article
• Austdal, Marie; Skråstad, Ragnhild; Gundersen, Astrid; Ausgtulen, Rigmor; Bathen, Tone; Iversen, Ann-Charlotte. (2013) Changes in Levels of Metabolomic Biomarkers in Serum and Urine in Women with Preeclampsia. Magnetic Resonance Materials in Physics, Biology and Medicine
  Conference abstract

2006

• Skråstad, Ragnhild Bergene; Blaas, Harm-Gerd. (2006) The spin-off effect of routine ultrasound in pregnancy: re-examinations after routine ultrasound examination. NTNU
  Working paper