Stian Lydersen

Professor of medical statistics

Regional Centre for Child and Youth Mental Health and Child Welfare Faculty of Medicine and Health Sciences Department of Mental Health

stian.lydersen@ntnu.no +47 73590155 +47 92632393

Klostergata 46, 317, Øya, Klostergata 46 / 48

stian.lydersen@ntnu.no

Education

M.Sc., Industrial mathematics, NTNU, 1983

Ph.D., statistics, NTNU, 1988

Books:

Veierød, M., Lydersen, S., Laake. P. (editors) 2012: ”Medical Statistics in Clinical and Epidemiological Research". Gyldendal Akademisk Forlag, Oslo.

Fagerland, M., Lydersen, S., & Laake, P. 2017. Statistical Analysis of Contingency Tables Chapman and Hall/CRC

Selected publications:

(For complete list klick here)

Stensvold, D., Viken, H., Steinshamn, S. L., Dalen, H., Støylen, A., Loennechen, J. P., Reitlo, L. S., Zisko, N., Bækkerud, F. H., Tari, A. R., Sandbakk, S. B., Carlsen, T., Ingebrigtsen, J. E., Lydersen, S., Mattsson, E., Anderssen, S. A., Fiatarone Singh, M. A., Coombes, J. S., Skogvoll, E., Vatten, L. J., Helbostad, J. L., Rognmo, Ø., & Wisløff, U. (2020). Effect of exercise training for five years on all cause mortality in older adults-the Generation 100 study: randomised controlled trial. BMJ, 371, m3485.

Lydersen, S. (2020). Should we adjust for background variables in a randomised controlled trial? Tidsskr Nor Legeforen, 140(5).

Lydersen, S. (2020). Samsvar mellom observatører – eller interobservatørsamsvar? Tidsskr Nor Legeforen, 140(5).

Lydersen, S. 2017. Hva er sannsynligheten for riktig resultat av en diagnostisk test? Tidsskrift for Den norske legeforening, 137, (18) 1437

Prestmo, A., Hagen, G., Sletvold, O., Helbostad, J.L., Thingstad, P., Taraldsen, K., Lydersen, S., Halsteinli, V., Saltnes, T., Lamb, S.E., Johnsen, L.G., & Saltvedt, I. 2015. Comprehensive geriatric care for patients with hip fractures: a prospective, randomised, controlled trial. Lancet, 385, (9978) 1623-1633

Lydersen, S. 2015. Statistical review: frequently given comments. Ann.Rheum.Dis., 74, (2) 323-325

Fagerland, M. W., Lydersen, S., & Laake, P. 2015. Recommended confidence intervals for two independent binomial proportions. Statistical Methods in Medical research, 42, (2) 224-254

Strand, K.M., Heimstad, R., Iversen, A.C., Austgulen, R., Lydersen, S., Andersen, G.L., Irgens, L.M., & Vik, T. 2013. Mediators of the association between pre-eclampsia and cerebral palsy: population based cohort study. BMJ, 347, f4089

Lydersen, S., Langaas, M., & Bakke, Ø. 2012, "The Exact Unconditional z-pooled Test for Equality of Two Binomial Probabilities: Optimal Choice of the Berger and Boos Confidence Coefficient", Journal of Statistical Computation and simulation, vol. 82, no. 9, pp. 1311-1316.

Lydersen, S., Fagerland, M. W., & Laake, P. 2009, "Tutorial in biostatistics: Recommended tests for association in 2x2 tables", Statistics in Medicine.

Lydersen, S. 2007, "The human sex ratio in New York did not change after 11 September 2001". Human Reproduction.

Lydersen, S., Pradhan, V., Senchaudhuri, P., & Laake, P. 2007 "Choice of test for association in small sample unordered rxc tables". Statistics in Medicine.

Lydersen, S., Pradhan, V., Laake, P., & Senchaudhuri, P. 2005, "Power Comparison of Exact Tests for Association in Unordered rxc Contingency Tables Using standard, Mid p, and Randomized Test Versions.", Journal of Statistical Computation and simulation, vol. 75 (6), pp. 447-458.

Lydersen, S. & Laake, P. 2003, "Power comparison of two-sided exact tests for association in 2 x 2 contingency tables using standard, mid p and randomized test versions", Stat.Med., vol. 22, no. 24, pp. 3859-3871.

Lydersen, S. 1992, "Clayton's Model for Dependent Components in Systems Reliability", Reliability Engineering and Systems Safety, vol. 36, pp. 53-58.

Lydersen, S. & Rausand, M. 1987, "A systematic Approach to Accelerated Life Testing.", Reliability Engineering, vol. 18, no. 4.

Editorial work:

Lydersen, S., Hansen, G. K, Sandtorv, H. (editors) 1998: "Safety and Reliability". Proceedings of the European Conference on Safety and Reliability - ESREL'98, Trondheim 16 - 19 June 1998. Balkema Publishers, Rotterdam.

Lydersen, S. (red) 2004: "Fra flis i fingeren til ragnarok. Tjue historier om sikkerhet." Tapir akademisk forlag, Trondheim.

Scientific, academic and artistic work

A selection of recent journal publications, artistic productions, books, including book and report excerpts. See all publications in the database

Journal publications

Aam, Stina; Einstad, Marte Stine; Munthe-Kaas, Ragnhild; Lydersen, Stian; Ihle-Hansen, Hege; Knapskog, Anne Brita; Ellekjær, Hanne; Seljeseth, Yngve Müller; Saltvedt, Ingvild. (2020) Post-stroke Cognitive Impairment—Impact of Follow-Up Time and Stroke Subtype on Severity and Cognitive Profile: The Nor-COAST Study. Frontiers in Neurology. vol. 11.
Aasbrenn, Martin; Lydersen, Stian; Farup, Per Grønaas. (2020) Changes in serum zonulin in individuals with morbid obesity after weight-loss interventions: a prospective cohort study. BMC Endocrine Disorders. vol. 20 (108).
Bjellmo, Solveig; Andersen, Guro Lillemoen; Hjelle, Sissel; Klungsøyr, Kari; Krebs, Lone; Lydersen, Stian; Romundstad, Pål Richard; Vik, Torstein. (2020) Does caesarean delivery in the first pregnancy increase the risk for adverse outcome in the second? A registry-based cohort study on first and second singleton births in Norway. BMJ Open. vol. 10 (8).
Gynnild, Mari Nordbø; Aakerøy, Rachel; Spigset, Olav; Askim, Torunn; Beyer, Mona Kristiansen; Ihle-Hansen, Hege; Munthe-Kaas, Ragnhild; Knapskog, Anne Brita; Lydersen, Stian; Næss, Halvor; Røsstad, Tove Garåsen; Seljeseth, Yngve Müller; Thingstad, Pernille; Saltvedt, Ingvild; Ellekjær, Hanne. (2020) Vascular risk factor control and adherence to secondary preventive medication after ischaemic stroke. Journal of Internal Medicine.
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.
Haugan, Anne-Lise Juul; Sund, Anne Mari; Thomsen, Per Hove; Lydersen, Stian; Nøvik, Torunn Stene. (2020) Psychometric properties of the Weiss Functional Impairment Rating Scale parent and self-reports in a Norwegian clinical sample of adolescents treated for ADHD. Nordic Journal of Psychiatry.
Haugan, Anne-Lise; Sund, Anne Mari; Thomsen, Per Hove; Lydersen, Stian; Nøvik, Torunn Stene. (2020) Psychometric properties of the Weiss Functional Impairment Rating Scale parent and self-reports in a Norwegian clinical sample of adolescents treated for ADHD. Nordic Journal of Psychiatry.
Høvik, Lise Husby; Gjeilo, Kari Hanne; Lydersen, Stian; Solligård, Erik; Damås, Jan Kristian; Gustad, Lise Tuset. (2020) Use of peripheral venous catheters in two Norwegian hospitals. Tidsskrift for Den norske legeforening.
Høydahl, Øystein; Edna, Tom-Harald; Xanthoulis, Athanasios; Lydersen, Stian; Endreseth, Birger Henning. (2020) Long-term trends in colorectal cancer: incidence, localization, and presentation. BMC Cancer.
Lionett, Sofie Buurgaard; Kiel, Ida Almenning; Camera, Donny M; Vanky, Eszter; Parr, Evelyn B.; Lydersen, Stian; Hawley, John A; Moholdt, Trine. (2020) Circulating and Adipose Tissue miRNAs in Women With Polycystic Ovary Syndrome and Responses to High-Intensity Interval Training. Frontiers in Physiology.
Løvaas, Mona Elisabeth S; Lydersen, Stian; Sund, Anne Mari; Neumer, Simon-Peter; Martinsen, Kristin Dagmar; Holen, Solveig; Patras, Joshua; Adolfsen, Frode; Rasmussen, Lene-Mari Potulski; Reinfjell, Trude. (2020) A 12-month follow-up of a transdiagnostic indicated prevention of internalizing symptoms in school-aged children: The results from the EMOTION study. Child and Adolescent Psychiatry and Mental Health (CAPMH). vol. 14.
Munthe-Kaas, Ragnhild; Aam, Stina; Ihle-Hansen, Hege; Lydersen, Stian; Knapskog, Anne Brita; Wyller, Torgeir Bruun; Fure, Brynjar; Thingstad, Pernille; Askim, Torunn; Beyer, Mona K.; Næss, Halvor; Seljeseth, Yngve Müller; Ellekjær, Hanne; Pendlebury, Sarah T.; Saltvedt, Ingvild. (2020) Impact of different methods defining post-stroke neurocognitive disorder: The Nor-COAST study. Alzheimer's and Dementia: Translational Research and Clinical Interventions. vol. 6:e12000 (1).
Mynarek, Maren; Bjellmo, Solveig; Lydersen, Stian; Afset, Jan Egil; Andersen, Guro Lillemoen; Vik, Torstein. (2020) Incidence of invasive Group B Streptococcal infection and the risk of infant death and cerebral palsy: a Norwegian Cohort Study. Pediatric Research.
Mynarek, Maren; Bjellmo, Solveig; Lydersen, Stian; Strand, Kristin Melheim; Afset, Jan Egil; Andersen, Guro Lillemoen; Vik, Torstein. (2020) Prelabor rupture of membranes and the association with cerebral palsy in term born children: A national registry-based cohort study. BMC Pregnancy and Childbirth. vol. 20.
Nøvik, Torunn Stene; Haugan, Anne-Lise Juul; Lydersen, Stian; Thomsen, Per Hove; Young, Susan; Sund, Anne Mari. (2020) Cognitive-behavioural group therapy for adolescents with ADHD: study protocol for a randomised controlled trial. BMJ Open.
Nøvik, Torunn Stene; Haugan, Anne-Lise; Lydersen, Stian; Thomsen, Per Hove; Young, Susan; Sund, Anne Mari. (2020) Cognitive-behavioural group therapy for adolescents with ADHD: study protocol for a randomised controlled trial. BMJ Open. vol. 10 (e032839).
Seim, Astrid Røsland; Jozefiak, Thomas; Wichstrøm, Lars; Lydersen, Stian; Kayed, Nanna Sønnichsen. (2020) Reactive attachment disorder and disinhibited social engagement disorder in adolescence: co-occurring psychopathology and psychosocial problems. European Child and Adolescent Psychiatry.
Stensvold, Dorthe; Viken, Hallgeir; Steinshamn, Sigurd Loe; Dalen, Håvard; Støylen, Asbjørn; Loennechen, Jan Pål; Reitlo, Line Skarsem; Zisko, Nina; Bækkerud, Fredrik Hjulstad; Tari, Atefe R; Sandbakk, Silvana B.; Carlsen, Trude; Ingebrigtsen, Jan Erik; Lydersen, Stian; Mattsson, Erney; Anderssen, Sigmund Alfred; Singh, Maria A. Fiatarone; Coombes, Jeff S.; Skogvoll, Eirik; Vatten, Lars Johan; Helbostad, Jorunn L.; Rognmo, Øivind; Wisløff, Ulrik. (2020) Effect of exercise training for five years on all cause mortality in older adults-The Generation 100 study: Randomised controlled trial. BMJ. British Medical Journal. vol. 371.
Arnli, Magnus Bossum; Meta, Rahmina; Lydersen, Stian; Torp, Sverre Helge. (2019) HER3 and HER4 are highly expressed in human meningiomas. Pathology, Research and Practice. vol. 215 (10).
Askim, Torunn; Saltvedt, Ingvild; Hokstad, Anne; Indredavik, Bent; Halsteinli, Vidar; Thingstad, Pernille; Bergh, Elin; Lydersen, Stian; Døhl, Øystein; Thommessen, Bente. (2019) A MULTIMODAL INDIVIDUALIZED INTERVENTION TO PREVENT FUNCTIONAL DECLINE AFTER STROKE. A RANDOMISED CONTROLLED TRIAL ON LONG-TERM FOLLOW-UP AFTER STROKE (THE LAST-LONG TRIAL). European Stroke Journal. vol. 4 (1).

Competencies

Medical statistics