Kari Klungsøyr

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BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is a prevalent and disabling lifespan disorder, but little is yet known about risk factors for ADHD persisting beyond adolescence. The present study investigates the association between pregnancy and birth complications and ADHD in adulthood. METHODS We used data from the Medical Birth Registry of(More)
Do cancer and cancer treatment influence patients' subsequent pregnancies and outcomes for the offspring? In this study, we compared birth outcomes in 3,915 female and male survivors and 144,653 controls from the general population with similar parity, by merging data from the Cancer Registry and the Medical Birth Registry of Norway. The cancer survivors(More)
OBJECTIVE Evaluating the validity of pre-eclampsia registration in the Medical Birth Registry of Norway (MBRN) according to both broader and restricted disease definitions. DESIGN Retrospective nested cohort study. SETTING Multicenter study. POPULATION In this study, two cohorts of women with pre-eclamptic pregnancies registered in the MBRN were(More)
OBJECTIVE To estimate gestational age-specific risks of fetal death in pregnancies complicated by preeclampsia. METHODS Population-based cohort study comprising all singleton births (N=554,333) without preexisting chronic hypertension recorded in the Norwegian Medical Birth Registry from 1999 to 2008. Additional data come from a subset of preeclamptic(More)
OBJECTIVE To systematically review, synthesize, and appraise available evidence, connecting adult ADHD (aADHD) with somatic disease. METHOD Embase, Psychinfo, and Medline databases were searched for studies published from 1994 to 2015 addressing aADHD and somatic comorbidity. Somatic conditions were classified according to International Classification of(More)
The Nordic medical birth registers have long been used for valuable clinical research. Their collection of data for more than four decades offers unusual possibilities for research across generations. At the same time, serum and blotting paper blood samples have been stored from most neonates. Two large cohorts (approximately 100 000 births) in Denmark and(More)
OBJECTIVES To explore utilisation patterns of asthma medication before, during and after pregnancy as recorded in seven European population-based databases. DESIGN A descriptive drug utilisation study. SETTING 7 electronic healthcare databases in Denmark, Norway, the Netherlands, Italy (Emilia Romagna and Tuscany), Wales, and the Clinical Practice(More)
BACKGROUND While international variations in overall cesarean delivery rates are well documented, less information is available for clinical sub-groups. Cesarean data presented by subgroups can be used to evaluate uptake of cesarean reduction policies or to monitor delivery practices for high and low risk pregnancies based on new scientific evidence. We(More)
INTRODUCTION The objective of this study was to examine the association between planned mode of delivery and neonatal outcomes in breech deliveries. MATERIAL AND METHODS In this retrospective cohort study we studied singleton term breech deliveries in Norway from 1991 to 2011 (n = 30 861) using the Medical Birth Registry of Norway. We compared planned(More)
Pre-eclampsia is a leading complication of pregnancy, associated with maternal and neonatal morbidity. The present study describes the epidemiology of pre-eclampsia in Norway, with data from the Medical Birth Registry of Norway, covering 40 years. We aimed at describing time trends in prevalence, selected risk factors and perinatal mortality. We also(More)