• COVID-19 and mental health: a longitudinal population study from Norway 

      Hvide, Hans K.; Johnsen, Julian Vedeler (Journal article; Peer reviewed, 2022)
      Existing research has found adverse short-term effects of the COVID-19 pandemic on mental health, but longer-term effects have been less documented. Using newly released register data on all general practitioner consultations ...
    • Parental age and birth defects: a sibling study 

      Hvide, Hans K.; Johnsen, Julian Vedeler; Salvanes, Kjell Gunnar (Journal article; Peer reviewed, 2021)
      Higher parental age at childbearing has generated much attention as a potential risk factor for birth disorders; however, previous research findings are mixed. Existing studies have exploited variation in parental age ...
    • Seasonal and pandemic influenza during pregnancy and risk of fetal death: A Norwegian registry‑based cohort study 

      Gunnes, Nina; Gjessing, Håkon K.; Bakken, Inger Johanne Landsjøåsen; Ghaderi, Sara; Gran, Jon Michael; Hungnes, Olav; Magnus, Per; Samuelsen, Sven Ove; Skrondal, Anders; Stoltenberg, Camilla; Trogstad, Lill; Wilcox, Allen James; Håberg, Siri Eldevik (Journal article; Peer reviewed, 2020)
      Previous studies of fetal death with maternal influenza have been inconsistent. We explored the effect of maternal influenza-like illness (ILI) in pregnancy on the risk of fetal death, distinguishing between diagnoses ...