1. ADHD treatment and diagnosis in relation to children's birth month: Nationwide cohort study from Norway. Issue 4 (June 2017) Authors: Karlstad, Øystein; Furu, Kari; Stoltenberg, Camilla; Håberg, Siri E.; Bakken, Inger Johanne Journal: Scandinavian journal of public health Issue: Volume 45:Issue 4(2017:Jun.) Page Start: 343 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Adjusting for unmeasured confounding using validation data: Simplified two‐stage calibration for survival and dichotomous outcomes. (3rd March 2019) Authors: Hjellvik, Vidar; De Bruin, Marie L.; Samuelsen, Sven O.; Karlstad, Øystein; Andersen, Morten; Haukka, Jari; Vestergaard, Peter; de Vries, Frank; Furu, Kari Journal: Statistics in medicine Issue: Volume 38:Number 15(2019) Page Start: 2719 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Airway symptoms and atopy in young children prescribed asthma medications: A large‐scale cohort study. Issue 10 (4th July 2019) Authors: Mikalsen, Ingvild Bruun; Dalen, Ingvild; Karlstad, Øystein; Eide, Geir Egil; Magnus, Maria; Nystad, Wenche; Øymar, Knut Journal: Pediatric pulmonology Issue: Volume 54:Issue 10(2019) Page Start: 1557 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. Antipsychotic use in pregnancy and risk of attention/deficit-hyperactivity disorder and autism spectrum disorder: a Nordic cohort study. Issue 2 (22nd November 2021) Authors: Hálfdánarson, Óskar; Cohen, Jacqueline M; Karlstad, Øystein; Cesta, Carolyn E; Bjørk, Marte-Helene; Håberg, Siri Eldevik; Einarsdóttir, Kristjana; Furu, Kari; Gissler, Mika; Hjellvik, Vidar; Kieler, Helle; Leinonen, Maarit K; Nørgaard, Mette; Öztürk Essen, Buket; Ulrichsen, Sinna Pilgaard; Reutfo... Journal: Evidence-based mental health Issue: Volume 25:Issue 2(2022) Page Start: 54 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
5. Arterial events, venous thromboembolism, thrombocytopenia, and bleeding after vaccination with Oxford-AstraZeneca ChAdOx1-S in Denmark and Norway: population based cohort study. (5th May 2021) Authors: Pottegård, Anton; Lund, Lars Christian; Karlstad, Øystein; Dahl, Jesper; Andersen, Morten; Hallas, Jesper; Lidegaard, Øjvind; Tapia, German; Gulseth, Hanne Løvdal; Ruiz, Paz Lopez-Doriga; Watle, Sara Viksmoen; Mikkelsen, Anders Pretzmann; Pedersen, Lars; Sørensen, Henrik Toft; Thomsen, Reimar Wer... Journal: BMJ Issue: Volume 373(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
6. Association of Maternal Psychosocial Stress With Increased Risk of Asthma Development in Offspring. Issue 6 (13th December 2017) Authors: Magnus, Maria C; Wright, Rosalind J; Røysamb, Espen; Parr, Christine L; Karlstad, Øystein; Page, Christian M; Nafstad, Per; Håberg, Siri E; London, Stephanie J; Nystad, Wenche Journal: American journal of epidemiology Issue: Volume 187:Issue 6(2018) Page Start: 1199 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
7. Clinical outcomes of myocarditis after SARS-CoV-2 mRNA vaccination in four Nordic countries: population based cohort study. Issue 1 (1st February 2023) Authors: Husby, Anders; Gulseth, Hanne Løvdal; Hovi, Petteri; Hansen, Jørgen Vinsløv; Pihlström, Nicklas; Gunnes, Nina; Härkänen, Tommi; Dahl, Jesper; Karlstad, Øystein; Heliö, Tiina; Køber, Lars; Ljung, Rickard; Hviid, Anders Journal: BMJ medicine Issue: Volume 2:Issue 1(2023) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
8. Comparative Safety of Antiseizure Medication Monotherapy for Major Malformations. Issue 3 (12th December 2022) Authors: Cohen, Jacqueline M.; Alvestad, Silje; Cesta, Carolyn E.; Bjørk, Marte‐Helene; Leinonen, Maarit K.; Nørgaard, Mette; Einarsdóttir, Kristjana; Engeland, Anders; Gissler, Mika; Karlstad, Øystein; Klungsøyr, Kari; Odsbu, Ingvild; Reutfors, Johan; Selmer, Randi M.; Tomson, Torbjörn; Ulrichsen, Sinna ... Journal: Annals of neurology Issue: Volume 93:Issue 3(2023) Page Start: 551 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
9. 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. Issue 5 (2nd May 2022) Authors: Holvik, Kristin; Hjellvik, Vidar; Karlstad, Øystein; Gunnes, Nina; Hoff, Mari; Tell, Grethe S; Meyer, Haakon E Journal: BMJ open Issue: Volume 12:Issue 5(2022) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
10. Identification of potential carcinogenic and chemopreventive effects of prescription drugs: a protocol for a Norwegian registry-based study. Issue 4 (8th April 2019) Authors: Andreassen, Bettina Kulle; Støer, Nathalie C; Martinsen, Jan Ivar; Ursin, Giske; Weiderpass, Elisabete; Thoresen, G Hege; Debernard, Karen Boldingh; Karlstad, Øystein; Pottegard, Anton; Friis, Søren Journal: BMJ open Issue: Volume 9:Issue 4(2019) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗