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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2007 1
2009 1
2010 1
2011 3
2012 1
2013 3
2014 2
2015 4
2016 7
2017 6
2018 9
2019 8
2020 9
2021 7
2022 7
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60 results
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Page 1
Trends in attention-deficit hyperactivity disorder medication use: a retrospective observational study using population-based databases.
Raman SR, Man KKC, Bahmanyar S, Berard A, Bilder S, Boukhris T, Bushnell G, Crystal S, Furu K, KaoYang YH, Karlstad Ø, Kieler H, Kubota K, Lai EC, Martikainen JE, Maura G, Moore N, Montero D, Nakamura H, Neumann A, Pate V, Pottegård A, Pratt NL, Roughead EE, Macias Saint-Gerons D, Stürmer T, Su CC, Zoega H, Sturkenbroom MCJM, Chan EW, Coghill D, Ip P, Wong ICK. Raman SR, et al. Among authors: karlstad o. Lancet Psychiatry. 2018 Oct;5(10):824-835. doi: 10.1016/S2215-0366(18)30293-1. Epub 2018 Sep 13. Lancet Psychiatry. 2018. PMID: 30220514
Association Between Methylphenidate and Amphetamine Use in Pregnancy and Risk of Congenital Malformations: A Cohort Study From the International Pregnancy Safety Study Consortium.
Huybrechts KF, Bröms G, Christensen LB, Einarsdóttir K, Engeland A, Furu K, Gissler M, Hernandez-Diaz S, Karlsson P, Karlstad Ø, Kieler H, Lahesmaa-Korpinen AM, Mogun H, Nørgaard M, Reutfors J, Sørensen HT, Zoega H, Bateman BT. Huybrechts KF, et al. Among authors: karlstad o. JAMA Psychiatry. 2018 Feb 1;75(2):167-175. doi: 10.1001/jamapsychiatry.2017.3644. JAMA Psychiatry. 2018. PMID: 29238795 Free PMC article.
Arterial events, venous thromboembolism, thrombocytopenia, and bleeding after vaccination with Oxford-AstraZeneca ChAdOx1-S in Denmark and Norway: population based cohort study.
Pottegård A, Lund LC, Karlstad Ø, Dahl J, Andersen M, Hallas J, Lidegaard Ø, Tapia G, Gulseth HL, Ruiz PL, Watle SV, Mikkelsen AP, Pedersen L, Sørensen HT, Thomsen RW, Hviid A. Pottegård A, et al. Among authors: karlstad o. BMJ. 2021 May 5;373:n1114. doi: 10.1136/bmj.n1114. BMJ. 2021. PMID: 33952445 Free PMC article.
SARS-CoV-2 Vaccination and Myocarditis in a Nordic Cohort Study of 23 Million Residents.
Karlstad Ø, Hovi P, Husby A, Härkänen T, Selmer RM, Pihlström N, Hansen JV, Nohynek H, Gunnes N, Sundström A, Wohlfahrt J, Nieminen TA, Grünewald M, Gulseth HL, Hviid A, Ljung R. Karlstad Ø, et al. JAMA Cardiol. 2022 Jun 1;7(6):600-612. doi: 10.1001/jamacardio.2022.0583. JAMA Cardiol. 2022. PMID: 35442390 Free PMC article.
Antipsychotic drug use in pregnancy: A multinational study from ten countries.
Reutfors J, Cesta CE, Cohen JM, Bateman BT, Brauer R, Einarsdóttir K, Engeland A, Furu K, Gissler M, Havard A, Hernandez-Diaz S, Huybrechts KF, Karlstad Ø, Leinonen MK, Li J, Man KKC, Pazzagli L, Schaffer A, Schink T, Wang Z, Yu Y, Zoega H, Bröms G. Reutfors J, et al. Among authors: karlstad o. Schizophr Res. 2020 Jun;220:106-115. doi: 10.1016/j.schres.2020.03.048. Epub 2020 Apr 12. Schizophr Res. 2020. PMID: 32295750 Free PMC article.
[Have recommendations on change of treatment had any effect?].
Øymar K, Karlstad Ø, Størdal K. Øymar K, et al. Among authors: karlstad o. Tidsskr Nor Laegeforen. 2021 Aug 24;141. doi: 10.4045/tidsskr.21.0437. Print 2021 Sep 7. Tidsskr Nor Laegeforen. 2021. PMID: 34505489 Free article. Norwegian. No abstract available.
Underlying conditions in adults with COVID-19.
Nystad W, Hjellvik V, Larsen IK, Ariansen I, Helland E, Johansen KI, Gulbrandsen J, Gulseth HL, Eide HN, Håberg SE, Karlstad Ø, Bakken IJ. Nystad W, et al. Among authors: karlstad o. Tidsskr Nor Laegeforen. 2020 Sep 16;140(13). doi: 10.4045/tidsskr.20.0512. Print 2020 Sep 29. Tidsskr Nor Laegeforen. 2020. PMID: 32998491 Free article. English, Norwegian.
Pre-eclampsia and childhood asthma.
Magnus MC, Håberg SE, Magnus P, Engeland A, Nafstad P, Karlstad Ø, Nystad W. Magnus MC, et al. Among authors: karlstad o. Eur Respir J. 2016 Dec;48(6):1622-1630. doi: 10.1183/13993003.00673-2016. Epub 2016 Oct 6. Eur Respir J. 2016. PMID: 27824595 Free article.
Lower Cancer Incidence-Warfarin Effect or Immortal Time Bias?
Svendsen K, Karlstad Ø, Småbrekke L. Svendsen K, et al. Among authors: karlstad o. JAMA Intern Med. 2018 Apr 1;178(4):585. doi: 10.1001/jamainternmed.2018.0370. JAMA Intern Med. 2018. PMID: 29610882 No abstract available.
60 results