TITLE

Third generation oral contraceptives and risk of venous thrombosis: meta-analysis

AUTHOR(S)
Kemmeren, Jeanet M; Algra, Ale; Grobbee, Diederick E
PUB. DATE
July 2001
SOURCE
BMJ: British Medical Journal (International Edition);7/21/2001, Vol. 323 Issue 7305, Special section p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Results: The overall adjusted odds ratio for third versus second generation oral contraceptives was 1.7 (95% confidence interval 1.4 to 2.0; seven studies). Similar risks were found when oral contraceptives containing desogestrel or gestodene were compared with those containing levonorgestrel. Among first time users, the odds ratio for third versus second generation preparations was 3.1 (2.0 to 4.6; four studies). The odds ratio was 2.5 (1.6 to 4.1; five studies) for short term users compared with 2.0 (1.4 to 2.7; five studies) for longer term users. The odds ratio was 1.3 (1.0 to 1.7) in studies funded by the pharmaceutical industry and 2.3 (1.7 to 3.2) in other studies. Differences in age and certainty of diagnosis of venous thrombosis did not affect the results.
ACCESSION #
4847370

 

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