Background and activities

Position:   Professor emeritus of paediatrics (Perinatal and paediatric epidemiology)          

Main field of research:

Perinatal and paediatric epidemiology.

I have studied various aspects of prematurity and intrauterine growth restriction (IUGR), with emphasis on growth and development, and the epdiemiology of cerebral palsy. I also founded the Cerebral palsy research group at NTNU ( and the Norwegian cerebral palsy registry (current acronym: NorCP). 


Medical education:

I had a special interest in educational issues: My main positions since 1986 have been as teacher in paediatrics, and I was elected academic dean in 2002-2006. Both before and during this period I took part in the revision of the medical curriculum and conducted  educational projects aiming at improving specialist education. 

 Selected, recent publications

Bjellmo S, Andersen GL, Hjelle S, Klungsøyr K, Krebs L, Lydersen S, Romundstad PR, Vik T. 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. 2020 Aug 23;10(8):e037717. doi: 10.1136/bmjopen-2020-037717.

Mynarek M, Bjellmo S, Lydersen S, Afset JE, Andersen GL, Vik T. Incidence of invasive Group B Streptococcal infection and the risk of infant death and cerebral palsy: a Norwegian Cohort Study. Pediatr Res. 2021 May;89(6):1541-1548. doi: 10.1038/s41390-020-1092-2. Epub 2020 Jul 29.

Vik T, Redline R, Nelson KB, Bjellmo S, Vogt C, Ng P, Strand KM, Nu TNT, Oskoui M. The Placenta in Neonatal Encephalopathy: A Case-Control Study. J Pediatr. 2018 Nov;202:77-85.e3. doi: 10.1016/j.jpeds.2018.06.005. Epub 2018 Jun 29.

Hollung SJ, Bakken IJ, Vik T, Lydersen S, Wiik R, Aaberg KM, Andersen GL. Comorbidities in cerebral palsy: a patient registry study. Dev Med Child Neurol. 2020 Jan;62(1):97-103. doi: 10.1111/dmcn.14307. Epub 2019 Jul 4.

Bjellmo S, Andersen GL, Martinussen MP, Romundstad PR, Hjelle S, Moster D, Vik T. Is vaginal breech delivery associated with higher risk for perinatal death and cerebral palsy compared with vaginal cephalic birth? Registry-based cohort study in Norway. BMJ Open. 2017 May 4;7(4):e014979. doi: 10.1136/bmjopen-2016-014979.

Hollung SJ, Vik T, Wiik R, Bakken IJ, Andersen GL. Completeness and correctness of cerebral palsy diagnoses in two health registers: implications for estimating prevalence. Dev Med Child Neurol. 2017 Apr;59(4):402-406. doi: 10.1111/dmcn.13341. Epub 2016 Nov 29.

Strand KM, Dahlseng MO, Lydersen S, Rø TB, Finbråten AK, Jahnsen RB, Andersen GL, Vik T. Growth during infancy and early childhood in children with cerebral palsy: a population-based study. Dev Med Child Neurol. 2016 Sep;58(9):924-30. doi: 10.1111/dmcn.13098. Epub 2016 Mar 15.

Strand KM, Andersen GL, Haavaldsen C, Vik T, Eskild A. Association of placental weight with cerebral palsy: population-based cohort study in Norway. BJOG. 2016 Dec;123(13):2131-2138. doi: 10.1111/1471-0528.13827. Epub 2015 Dec 22.

Finbråten AK, Martins C, Andersen GL, Skranes J, Brannsether B, Júlíusson PB, Syversen U, Stevenson RD, Vik T. Assessment of body composition in children with cerebral palsy: a cross-sectional study in Norway. Dev Med Child Neurol. 2015 Sep;57(9):858-64. doi: 10.1111/dmcn.12752. Epub 2015 Apr 1.

Lien E, Andersen G, Bao Y, Gordish-Dressman H, Skranes JS, Blackman JA, Vik T. Genes determining the severity of cerebral palsy: the role of single nucleotide polymorphisms on the amount and structure of apolipoprotein E. Acta Paediatr. 2015 Jul;104(7):701-6. doi: 10.1111/apa.12983. Epub 2015 Mar 27.

Stoknes M, Lien E, Andersen GL, Bao Y, Blackman JA, Lie RT, Vik T. Child apolipoprotein E gene variants and risk of cerebral palsy: estimation from case-parent triads. Eur J Paediatr Neurol. 2015 May;19(3):286-91. doi: 10.1016/j.ejpn.2014.12.017. Epub 2015 Jan 3.

Finbråten AK, Syversen U, Skranes J, Andersen GL, Stevenson RD, Vik T. Bone mineral density and vitamin D status in ambulatory and non-ambulatory children with cerebral palsy. Osteoporos Int. 2015 Jan;26(1):141-50. doi: 10.1007/s00198-014-2840-0. Epub 2014 Aug 14.

Strand KM, Heimstad R, Iversen AC, Austgulen R, Lydersen S, Andersen GL, Irgens LM, Vik T. Mediators of the association between pre-eclampsia and cerebral palsy: population based cohort study. BMJ. 2013 Jul 9;347:f4089. doi: 10.1136/bmj.f4089.

All publicationsCristin