Gun Peggy Strømstad Knudsen
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Author network for Gun Peggy Strømstad Knudsen by COREMINE medical


Publications 2017

Eilertsen EM, Gjerde LC, Reichborn-Kjennerud T, Ørstavik RE, Knudsen GP, Stoltenberg C, Czajkowski N, Røysamb E, Kendler KS, Ystrom E (2017)
Maternal alcohol use during pregnancy and offspring attention-deficit hyperactivity disorder (ADHD): a prospective sibling control study
Int J Epidemiol (in press)
PubMed 28449133

Gustavson K, Ystrom E, Stoltenberg C, Susser E, Surén P, Magnus P, Knudsen GP, Smith GD, Langley K, Rutter M, Aase H, Reichborn-Kjennerud T (2017)
Smoking in Pregnancy and Child ADHD
Pediatrics, 139 (2)
PubMed 28138005

Long EC, Aggen SH, Neale MC, Knudsen GP, Krueger RF, South SC, Czajkowski N, Nesvåg R, Ystrom E, Torvik FA, Kendler KS, Gillespie NA, Reichborn-Kjennerud T (2017)
The association between personality disorders with alcohol use and misuse: A population-based twin study
Drug Alcohol Depend, 174, 171-180
PubMed 28334662

Nesvåg R, Jönsson EG, Bakken IJ, Knudsen GP, Bjella TD, Reichborn-Kjennerud T, Melle I, Andreassen OA (2017)
The quality of severe mental disorder diagnoses in a national health registry as compared to research diagnoses based on structured interview
BMC Psychiatry, 17 (1), 93
PubMed 28292279

Nesvåg R, Reichborn-Kjennerud T, Gillespie NA, Knudsen GP, Bramness JG, Kendler KS, Ystrom E (2017)
Genetic and Environmental Contributions to the Association Between Cannabis Use and Psychotic-Like Experiences in Young Adult Twins
Schizophr Bull, 43 (3), 644-653
PubMed 27431873

Reichborn-Kjennerud T, Krueger RF, Ystrom E, Torvik FA, Rosenström TH, Aggen SH, South SC, Neale MC, Knudsen GP, Kendler KS, Czajkowski NO (2017)
Do DSM-5 Section II personality disorders and Section III personality trait domains reflect the same genetic and environmental risk factors?
Psychol Med, 47 (12), 2205-2215
PubMed 28414014

Seglem KB, Ørstavik R, Torvik FA, Gjerde LC, Røysamb E, Reichborn-Kjennerud T, Knudsen GP, Tambs K (2017)
Pre-pregnancy mental distress and musculoskeletal pain and sickness absence during pregnancy - a twin cohort study
Eur J Public Health, 27 (3), 477-481
PubMed 28175262

Torvik FA, Rosenström TH, Ystrom E, Tambs K, Røysamb E, Czajkowski N, Gillespie N, Knudsen GP, Kendler KS, Reichborn-Kjennerud T (2017)
Stability and change in etiological factors for alcohol use disorder and major depression
J Abnorm Psychol, 126 (6), 812-822
PubMed 28541064

Villanger GD, Learner E, Longnecker MP, Ask H, Aase H, Zoeller RT, Knudsen GP, Reichborn-Kjennerud T, Zeiner P, Engel SM (2017)
Effects of Sample Handling and Analytical Procedures on Thyroid Hormone Concentrations in Pregnant Women's Plasma
Epidemiology, 28 (3), 365-369
PubMed 27984425

Watson HJ, Zerwas S, Torgersen L, Gustavson K, Diemer EW, Knudsen GP, Reichborn-Kjennerud T, Bulik CM (2017)
Maternal eating disorders and perinatal outcomes: A three-generation study in the Norwegian Mother and Child Cohort Study
J Abnorm Psychol, 126 (5), 552-564
PubMed 28691845

Publications 2016

Kendler KS, Aggen SH, Gillespie N, Neale MC, Knudsen GP, Krueger RF, Czajkowski N, Ystrom E, Reichborn-Kjennerud T (2016)
The Genetic and Environmental Sources of Resemblance Between Normative Personality and Personality Disorder Traits
J Pers Disord, 31 (2), 193-207
PubMed 27322578

Magnus P, Birke C, Vejrup K, Haugan A, Alsaker E, Daltveit AK, Handal M, Haugen M, Høiseth G, Knudsen GP, Paltiel L, Schreuder P, Tambs K, Vold L, Stoltenberg C (2016)
Cohort Profile Update: The Norwegian Mother and Child Cohort Study (MoBa)
Int J Epidemiol, 45 (2), 382-8
PubMed 27063603

Sheerin C, Berenz EC, Knudsen GP, Reichborn-Kjennerud T, Kendler KS, Aggen SH, Amstadter AB (2016)
A population-based study of help seeking and self-medication among trauma-exposed individuals
Psychol Addict Behav, 30 (7), 771-777
PubMed 27269293

South SC, Krueger RF, Knudsen GP, Ystrom E, Czajkowski N, Aggen SH, Neale MC, Gillespie NA, Kendler KS, Reichborn-Kjennerud T (2016)
A population based twin study of DSM-5 maladaptive personality domains
Personal Disord, 8 (4), 366-375
PubMed 27797545

Torvik FA, Reichborn-Kjennerud T, Gjerde LC, Knudsen GP, Ystrom E, Tambs K, Røysamb E, Østby K, Ørstavik R (2016)
Mood, anxiety, and alcohol use disorders and later cause-specific sick leave in young adult employees
BMC Public Health, 15, 702
PubMed 27488425

Østby KA, Czajkowski N, Knudsen GP, Ystrøm E, Gjerde LC, Kendler KS, Ørstavik RE, Reichborn-Kjennerud T (2016)
Does low alcohol use increase the risk of sickness absence? A discordant twin study
BMC Public Health, 16 (1), 825
PubMed 27538396

Aarem J, Brunborg G, Aas KK, Harbak K, Taipale MM, Magnus P, Knudsen GP, Duale N (2016)
Comparison of blood RNA isolation methods from samples stabilized in Tempus tubes and stored at a large human biobank
BMC Res Notes, 9 (1), 430
PubMed 27587079

Publications 2015

Gjerde LC, Czajkowski N, Røysamb E, Ystrom E, Tambs K, Aggen SH, Ørstavik RE, Kendler KS, Reichborn-Kjennerud T, Knudsen GP (2015)
A longitudinal, population-based twin study of avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood
Psychol Med, 45 (16), 3539-48
PubMed 26273730

Guidry VT, Longnecker MP, Aase H, Eggesbø M, Zeiner P, Reichborn-Kjennerud T, Knudsen GP, Bertelsen RJ, Ye X, Calafat AM, Engel SM (2015)
Measurement of Total and Free Urinary Phenol and Paraben Concentrations over the Course of Pregnancy: Assessing Reliability and Contamination of Specimens in the Norwegian Mother and Child Cohort Study
Environ Health Perspect, 123 (7), 705-11
PubMed 25782115

Ludvigsson JF, Håberg SE, Knudsen GP, Lafolie P, Zoega H, Sarkkola C, von Kraemer S, Weiderpass E, Nørgaard M (2015)
Ethical aspects of registry-based research in the Nordic countries
Clin Epidemiol, 7, 491-508
PubMed 26648756

Nesvåg R, Knudsen GP, Bakken IJ, Høye A, Ystrom E, Surén P, Reneflot A, Stoltenberg C, Reichborn-Kjennerud T (2015)
Substance use disorders in schizophrenia, bipolar disorder, and depressive illness: a registry-based study
Soc Psychiatry Psychiatr Epidemiol, 50 (8), 1267-76
PubMed 25680837

Reichborn-Kjennerud T, Czajkowski N, Ystrøm E, Ørstavik R, Aggen SH, Tambs K, Torgersen S, Neale MC, Røysamb E, Krueger RF, Knudsen GP, Kendler KS (2015)
A longitudinal twin study of borderline and antisocial personality disorder traits in early to middle adulthood
Psychol Med, 45 (14), 3121-31
PubMed 26050739

Steinberg S, Stefansson H, Jonsson T, Johannsdottir H, Ingason A, Helgason H, Sulem P, Magnusson OT, Gudjonsson SA, Unnsteinsdottir U, Kong A, Helisalmi S, Soininen H, Lah JJ, DemGene, Aarsland D, Fladby T, Ulstein ID, Djurovic S, Sando SB, White LR, Knudsen GP, Westlye LT, Selbæk G, Giegling I et al. (2015)
Loss-of-function variants in ABCA7 confer risk of Alzheimer's disease
Nat Genet, 47 (5), 445-7
PubMed 25807283

Strand BH, Rosness TA, Engedal K, Magnus P, Bergem AL, Schirmer H, Bjertness E, Knudsen GP (2015)
Interaction of Apolipoprotein E Genotypes, Lifestyle Factors and Future Risk of Dementia-Related Mortality: The Cohort of Norway (CONOR)
Dement Geriatr Cogn Disord, 40 (3-4), 137-47
PubMed 26088392

Torvik FA, Welander-Vatn A, Ystrom E, Knudsen GP, Czajkowski N, Kendler KS, Reichborn-Kjennerud T (2015)
Longitudinal associations between social anxiety disorder and avoidant personality disorder: A twin study
J Abnorm Psychol, 125 (1), 114-24
PubMed 26569037

Torvik FA, Ystrom E, Czajkowski N, Tambs K, Røysamb E, Ørstavik R, Knudsen GP, Kendler KS, Reichborn-Kjennerud T (2015)
Socioeconomic status and sick leave granted for mental and somatic disorders: a prospective study of young adult twins
BMC Public Health, 15, 134
PubMed 25884296

Welander-Vatn A, Ystrom E, Tambs K, Neale MC, Kendler KS, Reichborn-Kjennerud T, Knudsen GP (2015)
The relationship between anxiety disorders and dimensional representations of DSM-IV personality disorders: A co-twin control study
J Affect Disord, 190, 349-356
PubMed 26544619

Zayats T, Athanasiu L, Sonderby I, Djurovic S, Westlye LT, Tamnes CK, Fladby T, Aase H, Zeiner P, Reichborn-Kjennerud T, Knappskog PM, Knudsen GP, Andreassen OA, Johansson S, Haavik J (2015)
Genome-wide analysis of attention deficit hyperactivity disorder in Norway
PLoS One, 10 (4), e0122501
PubMed 25875332

Publications 2014

Bakken IJ, Revdal E, Nesvåg R, Brenner E, Knudsen GP, Surén P, Ghaderi S, Gunnes N, Magnus P, Reichborn-Kjennerud T, Camilla Stoltenberg, Trogstad LI, Håberg SE, Brodtkorb E (2014)
Substance use disorders and psychotic disorders in epilepsy: a population-based registry study
Epilepsy Res, 108 (8), 1435-43
PubMed 25062893

Bertelsen RJ, Engel SM, Jusko TA, Calafat AM, Hoppin JA, London SJ, Eggesbø M, Aase H, Zeiner P, Reichborn-Kjennerud T, Knudsen GP, Guidry VT, Longnecker MP (2014)
Reliability of triclosan measures in repeated urine samples from Norwegian pregnant women
J Expo Sci Environ Epidemiol, 24 (5), 517-21
PubMed 24472755

Boraska V, Franklin CS, Floyd JA, Thornton LM, Huckins LM, Southam L, Rayner NW, Tachmazidou I, Klump KL, Treasure J, Lewis CM, Schmidt U, Tozzi F, Kiezebrink K, Hebebrand J, Gorwood P, Adan RA, Kas MJ, Favaro A, Santonastaso P, Fernández-Aranda F, Gratacos M, Rybakowski F, Dmitrzak-Weglarz M, Kaprio J et al. (2014)
A genome-wide association study of anorexia nervosa
Mol Psychiatry, 19 (10), 1085-94
PubMed 24514567

Brown RC, Berenz EC, Aggen SH, Gardner CO, Knudsen GP, Reichborn-Kjennerud T, Kendler KS, Amstadter AB (2014)
Trauma Exposure and Axis I Psychopathology: A Co-twin Control Analysis in Norwegian Young Adults
Psychol Trauma, 6 (6), 652-660
PubMed 25544868

Gjerde LC, Røysamb E, Czajkowski N, Knudsen GP, Ostby K, Tambs K, Kendler KS, Reichborn-Kjennerud T, Orstavik RE (2014)
Personality disorders and long-term sick leave: a population-based study of young adult Norwegian twins
Twin Res Hum Genet, 17 (1), 1-9
PubMed 24417773

Jansen MD, Knudsen GP, Myhre R, Høiseth G, Mørland J, Næss Ø, Tambs K, Magnus P (2014)
Genetic variants in loci 1p13 and 9p21 and fatal coronary heart disease in a Norwegian case-cohort study
Mol Biol Rep, 41 (5), 2733-43
PubMed 24728607

Kendler KS, Aggen SH, Neale MC, Knudsen GP, Krueger RF, Tambs K, Czajkowski N, Ystrom E, Ørstavik RE, Reichborn-Kjennerud T (2014)
A longitudinal twin study of cluster A personality disorders
Psychol Med, 45 (7), 1531-8
PubMed 25394477

Orstavik RE, Czajkowski N, Røysamb E, Knudsen GP, Tambs K, Reichborn-Kjennerud T (2014)
Sex differences in genetic and environmental influences on educational attainment and income
Twin Res Hum Genet, 17 (6), 516-25
PubMed 25431286

Torvik FA, Gjerde LC, Røysamb E, Tambs K, Kendler KS, Czajkowski NO, Knudsen GP, Reichborn-Kjennerud T, Ørstavik RE (2014)
Genetic and environmental contributions to the relationship between internalizing disorders and sick leave granted for mental and somatic disorders
Twin Res Hum Genet, 17 (4), 225-35
PubMed 24823276

Østby KA, Czajkowski N, Knudsen GP, Ystrom E, Gjerde LC, Kendler KS, Ørstavik RE, Reichborn-Kjennerud T (2014)
Personality disorders are important risk factors for disability pensioning
Soc Psychiatry Psychiatr Epidemiol, 49 (12), 2003-11
PubMed 24791656

Publications 2013

Berenz EC, Amstadter AB, Aggen SH, Knudsen GP, Reichborn-Kjennerud T, Gardner CO, Kendler KS (2013)
Childhood trauma and personality disorder criterion counts: a co-twin control analysis
J Abnorm Psychol, 122 (4), 1070-6
PubMed 24364608

Gjerde LC, Knudsen GP, Czajkowski N, Gillespie N, Aggen SH, Røysamb E, Reichborn-Kjennerud T, Tambs K, Kendler KS, Orstavik RE (2013)
Genetic and environmental contributions to long-term sick leave and disability pension: a population-based study of young adult Norwegian twins
Twin Res Hum Genet, 16 (4), 759-66
PubMed 23743022

Høiseth G, Magnus P, Knudsen GP, Jansen MD, Næss O, Tambs K, Mørland J (2013)
Is ADH1C genotype relevant for the cardioprotective effect of alcohol?
Alcohol, 47 (2), 81-4
PubMed 23321361

Reichborn-Kjennerud T, Ystrom E, Neale MC, Aggen SH, Mazzeo SE, Knudsen GP, Tambs K, Czajkowski NO, Kendler KS (2013)
Structure of genetic and environmental risk factors for symptoms of DSM-IV borderline personality disorder
JAMA Psychiatry, 70 (11), 1206-14
PubMed 24048243

Publications 2012

Amstadter AB, Aggen SH, Knudsen GP, Reichborn-Kjennerud T, Kendler KS (2012)
A population-based study of familial and individual-specific environmental contributions to traumatic event exposure and posttraumatic stress disorder symptoms in a Norwegian twin sample
Twin Res Hum Genet, 15 (5), 656-62
PubMed 22877512

Amstadter AB, Aggen SH, Knudsen GP, Reichborn-Kjennerud T, Kendler KS (2012)
Potentially traumatic event exposure, posttraumatic stress disorder, and Axis I and II comorbidity in a population-based study of Norwegian young adults
Soc Psychiatry Psychiatr Epidemiol, 48 (2), 215-23
PubMed 22782308

Gjerde LC, Czajkowski N, Røysamb E, Orstavik RE, Knudsen GP, Ostby K, Torgersen S, Myers J, Kendler KS, Reichborn-Kjennerud T (2012)
The heritability of avoidant and dependent personality disorder assessed by personal interview and questionnaire
Acta Psychiatr Scand, 126 (6), 448-57
PubMed 22486635

Graff-Iversen S, Jansen MD, Hoff DA, Høiseth G, Knudsen GP, Magnus P, Mørland J, Normann PT, Næss OE, Tambs K (2012)
Divergent associations of drinking frequency and binge consumption of alcohol with mortality within the same cohort
J Epidemiol Community Health, 67 (4), 350-7
PubMed 23235547

Nielsen CS, Knudsen GP, Steingrímsdóttir ÓA (2012)
Twin studies of pain
Clin Genet, 82 (4), 331-40
PubMed 22823509

Nilsen TS, Knudsen GP, Gervin K, Brandt I, Røysamb E, Tambs K, Orstavik R, Lyle R, Reichborn-Kjennerud T, Magnus P, Harris JR (2012)
The Norwegian Twin Registry from a public health perspective: a research update
Twin Res Hum Genet, 16 (1), 285-95
PubMed 23186607

Publications 2011

Magnus P, Bakke E, Hoff DA, Høiseth G, Graff-Iversen S, Knudsen GP, Myhre R, Normann PT, Næss Ø, Tambs K, Thelle DS, Mørland J (2011)
Controlling for high-density lipoprotein cholesterol does not affect the magnitude of the relationship between alcohol and coronary heart disease
Circulation, 124 (21), 2296-302
PubMed 22042888

Publications 2010

Kendler KS, Aggen SH, Knudsen GP, Røysamb E, Neale MC, Reichborn-Kjennerud T (2010)
The structure of genetic and environmental risk factors for syndromal and subsyndromal common DSM-IV axis I and all axis II disorders
Am J Psychiatry, 168 (1), 29-39
PubMed 20952461

Publications 2009

Brix TH, Hansen PS, Knudsen GP, Kringen MK, Kyvik KO, Orstavik KH, Hegedüs L (2009)
No link between X chromosome inactivation pattern and simple goiter in females: evidence from a twin study
Thyroid, 19 (2), 165-9
PubMed 19191747

Knudsen GP (2009)
Gender bias in autoimmune diseases: X chromosome inactivation in women with multiple sclerosis
J Neurol Sci, 286 (1-2), 43-6
PubMed 19411081

Publications 2008

Knudsen GP, Riegert-Johnson DL, Meling GI, Boardman LA, Orstavik KH (2008)
Lack of association between skewing of X-chromosome inactivation in blood cells and colorectal cancer
Int J Biol Markers, 23 (2), 127-8
PubMed 18629787

Publications 2007

Knudsen GP, Harbo HF, Smestad C, Celius EG, Akesson E, Oturai A, Ryder LP, Spurkland A, Ørstavik KH (2007)
X chromosome inactivation in females with multiple sclerosis
Eur J Neurol, 14 (12), 1392-6
PubMed 17970735

Knudsen GP, Pedersen J, Klingenberg O, Lygren I, Ørstavik KH (2007)
Increased skewing of X chromosome inactivation with age in both blood and buccal cells
Cytogenet Genome Res, 116 (1-2), 24-8
PubMed 17268174

Ørstavik KH, Knudsen GP, Nordgarden H, Ormerod E, Strømme P, Lazarou LP, Rosser LG, Prescott T, Houge G (2007)
Severe hypohidrotic ectodermal dysplasia in a girl caused by a de novo 9;X insertion that includes XIST and disrupts the EDA gene
Am J Med Genet A, 143A (13), 1510-3
PubMed 17568423

Publications 2006

Knudsen GP, Neilson TC, Pedersen J, Kerr A, Schwartz M, Hulten M, Bailey ME, Orstavik KH (2006)
Increased skewing of X chromosome inactivation in Rett syndrome patients and their mothers
Eur J Hum Genet, 14 (11), 1189-94
PubMed 16823396

Ørstavik KH, Kristiansen M, Knudsen GP, Storhaug K, Vege A, Eiklid K, Abrahamsen TG, Smahi A, Steen-Johnsen J (2006)
Novel splicing mutation in the NEMO (IKK-gamma) gene with severe immunodeficiency and heterogeneity of X-chromosome inactivation
Am J Med Genet A, 140 (1), 31-9
PubMed 16333836

Publications 2005

Brix TH, Knudsen GP, Kristiansen M, Kyvik KO, Orstavik KH, Hegedüs L (2005)
High frequency of skewed X-chromosome inactivation in females with autoimmune thyroid disease: a possible explanation for the female predisposition to thyroid autoimmunity
J Clin Endocrinol Metab, 90 (11), 5949-53
PubMed 16105963

Charman T, Neilson TC, Mash V, Archer H, Gardiner MT, Knudsen GP, McDonnell A, Perry J, Whatley SD, Bunyan DJ, Ravn K, Mount RH, Hastings RP, Hulten M, Orstavik KH, Reilly S, Cass H, Clarke A, Kerr AM, Bailey ME (2005)
Dimensional phenotypic analysis and functional categorisation of mutations reveal novel genotype-phenotype associations in Rett syndrome
Eur J Hum Genet, 13 (10), 1121-30
PubMed 16077736

Fritz B, Kunz J, Knudsen GP, Louwen F, Kennerknecht I, Eiben B, Orstavik KH, Friedrich U, Rehder H (2005)
Situs ambiguus in a female fetus with balanced (X;21) translocation--evidence for functional nullisomy of the ZIC3 gene?
Eur J Hum Genet, 13 (1), 34-40
PubMed 15470371

Grogan PM, Tanner SM, Ørstavik KH, Knudsen GP, Saperstein DS, Vogel H, Barohn RJ, Herbelin LL, McVey AL, Katz JS (2005)
Myopathy with skeletal asymmetry and hemidiaphragm elevation is caused by myotubularin mutations
Neurology, 64 (9), 1638-40
PubMed 15883335

Kristiansen M, Knudsen GP, Bathum L, Naumova AK, Sørensen TI, Brix TH, Svendsen AJ, Christensen K, Kyvik KO, Ørstavik KH (2005)
Twin study of genetic and aging effects on X chromosome inactivation
Eur J Hum Genet, 13 (5), 599-606
PubMed 15756296

Kristiansen M, Knudsen GP, Maguire P, Margolin S, Pedersen J, Lindblom A, Ørstavik KH (2005)
High incidence of skewed X chromosome inactivation in young patients with familial non-BRCA1/BRCA2 breast cancer
J Med Genet, 42 (11), 877-80
PubMed 15879497

Publications 2003

Kristiansen M, Knudsen GP, Tanner SM, McEntagart M, Jungbluth H, Muntoni F, Sewry C, Gallati S, Ørstavik KH, Wallgren-Pettersson C (2003)
X-inactivation patterns in carriers of X-linked myotubular myopathy
Neuromuscul Disord, 13 (6), 468-71
PubMed 12899873

Publications 2002

Kristiansen M, Knudsen GP, Søyland A, Westvik J, Ørstavik KH (2002)
Phenotypic variation in Melnick-Needles syndrome is not reflected in X inactivation patterns from blood or buccal smear
Am J Med Genet, 108 (2), 120-7
PubMed 11857561

Kristiansen M, Langerød A, Knudsen GP, Weber BL, Børresen-Dale AL, Orstavik KH (2002)
High frequency of skewed X inactivation in young breast cancer patients
J Med Genet, 39 (1), 30-3
PubMed 11826021