Browsing Norwegian Institute of Public Health Open Repository by Author "Karlstad, Øystein"
Now showing items 1-20 of 46
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Absolute and Dose-Adjusted Serum Concentrations of Clozapine in Patients Switching vs. Maintaining Treatment: An Observational Study of 1979 Patients
Kyllesø, Lennart; Smith, Robert Løvsletten; Karlstad, Øystein; Andreassen, Ole A.; Molden, Espen (Peer reviewed; Journal article, 2021) -
ADHD i Norge: en statusrapport
Ørstavik, Ragnhild; Gustavson, Kristin; Rohrer-Baumgartner, Nina; Biele, Guido; Furu, Kari; Karlstad, Øystein; Reichborn-Kjennerud, Ted; Borge, Tiril Cecilie; Aase, Heidi (Research report, 2016)Rapporten er basert på analyser av de datakilder som er best egnet for dette formålet. Disse har likevel noen begrensninger som må tas i betraktning. Analysene vi presenterer er basert på tre datakilder: Norsk pasientregister ... -
Adjusting for unmeasured confounding using validation data: Simplified two‐stage calibration for survival and dichotomous outcomes
Hjellvik, Vidar; de Bruin, Marie L.; Samuelsen, Sven Ove; Karlstad, Øystein; Andersen, Morten; Haukka, Jari; Vestergaard, Peter; de Vries, Frank; Furu, Kari (Peer reviewed; Journal article, 2019) -
Airway symptoms and atopy in young children prescribed asthma medications: A large‐scale cohort study
Mikalsen, Ingvild Bruun; Dalen, Ingvild; Karlstad, Øystein; Eide, Geir Egil; Magnus, Maria Christine; Nystad, Wenche; Øymar, Knut (Peer reviewed; Journal article, 2019) -
Airway symptoms and atopy in young children prescribed asthma medications: A large‐scale cohort study
Mikalsen, Ingvild Bruun; Dalen, Ingvild; Karlstad, Øystein; Eide, Geir Egil; Magnus, Maria Christine; Nystad, Wenche; Øymar, Knut (Peer reviewed; Journal article, 2019) -
Antidiabetic medication use during pregnancy: an international utilization study
Cesta, Carolyn E.; Cohen, Jacqueline Mallory; Pazzagli, Laura; Bateman, Brian T.; Bröms, Gabriella; Einarsdottir, Kristjana; Furu, Kari; Havard, Alys; Heino, Anna; Hernandez-Diaz, Sonia; Huybrechts, Krista F.; Karlstad, Øystein; Kieler, Helle; Li, Jiong; Leinonen, Maarit K.; Gulseth, Hanne Løvdal; Tran, Duong D.; Yu, Yongfu; Zoega, Helga; Odsbu, Ingvild (Peer reviewed; Journal article, 2019) -
Antipsychotic drug use in pregnancy: A multinational study from ten countries
Reutfors, Johan; Cesta, Carolyn; Cohen, Jacqueline Mallory; Bateman, Brian T; Brauer, Ruth; Einarsdottir, Kristjana; Engeland, Anders; Furu, Kari; Gissler, Mika; Havard, Alys; Hernandez-Diaz, Sonia; Huybrechts, Krista F.; Karlstad, Øystein; Leinonen, Maarit; Li, Jiong; Man, Kenneth K. C.; Pazzagli, Laura; Schaffer, Andrea; Schink, Tania; Wang, Zixuan; Yu, Yongfu; Zoega, Helga; Bröms, Gabriella (Peer reviewed; Journal article, 2020) -
Antipsychotic use in pregnancy and risk of attention/deficit-hyperactivity disorder and autism spectrum disorder: a Nordic cohort study
Halfdanarson, Oskar; Cohen, Jacqueline Mallory; Karlstad, Øystein; Cesta, Carolyn E.; Bjørk, Marte-Helene; Håberg, Siri Eldevik; Einarsdottir, Kristjana; Furu, Kari; Gissler, Mika; Hjellvik, Vidar; Kieler, Helle; Leinonen, Maarit; Nørgaard, Mette; Essen, Buket Öztürk; Ulrichsen, Sinna Pilgaard; Reutfors, Johan; Zoega, Helga (Peer reviewed; Journal article, 2021)Abstract Background Antipsychotics are increasingly used among women of childbearing age and during pregnancy. Objective To determine whether children exposed to antipsychotics in utero are at increased risk of ... -
Arterial events, venous thromboembolism, thrombocytopenia, and bleeding after vaccination with Oxford-AstraZeneca ChAdOx1-S in Denmark and Norway: population based cohort study
Pottegård, Anton; Lund, Lars; Karlstad, Øystein; Dahl, Jesper; Andersen, Morten; Hallas, Jesper; Lidegaard, Øjvind; Tapia, German; Gulseth, Hanne Løvdal; Lopez-Doriga Ruiz, Paz; Watle, Sara Sofie Viksmoen; Mikkelsen, Anders; Pedersen, Lars; Sørensen, Henrik Toft; Thomsen, Reimar Wernich; Hviid, Anders (Peer reviewed; Journal article, 2021) -
Cancer risk among insulin users: comparing analogues with human insulin in the CARING five-country cohort study
But, Anna; de Bruin, Marie L; Bazelier, Marloes T; Hjellvik, Vidar; Andersen, Morten; Auvinen, Anssi; Starup-Linde, Jakob; Schmidt, Marjanka K; Furu, Kari; de Vries, Frank; Karlstad, Øystein; Ekström, Nils; Haukka, Jari (Peer reviewed; Journal article, 2017) -
Clinical outcomes of myocarditis after SARS-CoV-2 mRNA vaccination in four Nordic countries: population based cohort study
Husby, Anders; Gulseth, Hanne Løvdal; Hovi, Petteri; Hansen, Jørgen Vinsløv; Pihlstrøm, Nicklas; Gunnes, Nina; Härkänen, Tommi; Dahl, Jesper; Karlstad, Øystein; Heliö, Tiina; Køber, Lars; Ljung, Rickard; Hviid, Anders (Peer reviewed; Journal article, 2023) -
Comorbidities in an asthma population 8-29 years old: a study from the Norwegian Prescription Database
Karlstad, Øystein; Nafstad, Per; Tverdal, Aage; Skurtveit, Svetlana; Furu, Kari (Journal article, 2012) -
Comparative effectiveness of warfarin, dabigatran, rivaroxaban and apixaban in nonvalvular atrial fibrillation: A nationwide pharmacoepidemiological study
Kjerpeseth, Lars Jøran; Selmer, Randi Marie; Ariansen, Inger; Karlstad, Øystein; Ellekjær, Hanne; Skovlund, Eva (Peer reviewed; Journal article, 2019)Objective: To compare effectiveness and safety of warfarin and the direct oral anticoagulants (DOAC) dabigatran, rivaroxaban and apixaban in non-valvular atrial fibrillation in routine care. Methods: From nationwide ... -
Comparative Safety of Antiseizure Medication Monotherapy for Major Malformations
Cohen, Jacqueline Mallory; Alvestad, Silje; Cesta, Carolyn E.; Bjørk, Marte-Helene; Leinonen, Maarit; Nørgaard, Mette; Einarsdóttir, Kristjana; Engeland, Anders; Gissler, Mika; Karlstad, Øystein; Klungsøyr, Kari; Odsbu, Ingvild; Reutfors, Johan; Selmer, Randi Marie; Tomson, Torbjörn; Ulrichsen, Sinna Pilgaard; Zoega, Helga; Furu, Kari (Peer reviewed; Journal article, 2022) -
Contribution of an extensive medication-based comorbidity index (Rx-Risk) in explaining the excess mortality after hip fracture in older Norwegians: a NOREPOS cohort study
Holvik, Kristin; Hjellvik, Vidar; Karlstad, Øystein; Gunnes, Nina; Hoff, Mari; Tell, Grethe Seppola; Meyer, Haakon Eduard (Peer reviewed; Journal article, 2022)Objectives: Patients with hip fracture are typically characterised by extensive comorbidities and excess mortality. Methods that account for a wide range of comorbidities are needed when attempting to identify causal ... -
Drug Use and Cancer Risk: A Drug-Wide Association Study (DWAS) in Norway*
Støer, Nathalie Charlotte; Botteri, Edoardo; Thoresen, G. Hege; Karlstad, Øystein; Weiderpass, Elisabete; Friis, Søren; Pottegård, Anton; Kulle, Bettina (Peer reviewed; Journal article, 2020) -
Drug Use and Cancer Risk: A Drug-Wide Association Study (DWAS) in Norway*
Støer, Nathalie Charlotte; Botteri, Edoardo; Thoresen, G. Hege; Karlstad, Øystein (Peer reviewed; Journal article, 2020) -
Forskrivning av legemidler mot astma til barn i perioden 2004–15
Mikalsen, Ingvild Bruun; Karlstad, Øystein; Furu, Kari; Øymar, Knut (Peer reviewed; Journal article, 2018) -
Hormonal contraceptive use in Norway, 2006-2020, by contraceptive type, age and county: A nationwide register-based study
Furu, Kari; Aares, Ellen Barth; Hjellvik, Vidar; Karlstad, Øystein (Peer reviewed; Journal article, 2021) -
Identification of potential carcinogenic and chemopreventive effects of prescription drugs: A protocol for a Norwegian registry-based study
Kulle, Bettina; Støer, Nathalie Charlotte; Martinsen, Jan Ivar; Ursin, Giske; Weiderpass, Elisabete; Thoresen, G. Hege; Debernard, Karen A. Boldingh; Karlstad, Øystein; Pottegard, Anton; Friis, Søren (Peer reviewed; Journal article, 2019)