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Safety of hormonal replacement therapy and oral contraceptives in systemic lupus erythematosus : A systematic review and meta-analysis

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Rojas-Villarraga, Adriana
Torres-Gonzalez, July-Vianneth
Ruíz Sternberg, Ángela María



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Background: There is conflicting data regarding exogenous sex hormones [oral contraceptives (OC) and hormonal replacement therapy (HRT)] exposure and different outcomes on Systemic Lupus Erythematosus (SLE). The aim of this work is to determine, through a systematic review and meta-analysis the risks associated with estrogen use for women with SLE as well as the association of estrogen with developing SLE. Methods and Findings: MEDLINE, EMBASE, SciElo, BIREME and the Cochrane library (1982 to July 2012), were databases from which were selected and reviewed (PRISMA guidelines) randomized controlled trials, cross-sectional, case-control and prospective or retrospective nonrandomized, comparative studies without language restrictions. Those were evaluated by two investigators who extracted information on study characteristics, outcomes of interest, risk of bias and summarized strength of evidence. A total of 6,879 articles were identified; 20 full-text articles were included. Thirty-two meta-analyses were developed. A significant association between HRT exposure (Random model) and an increased risk of developing SLE was found (Rate Ratio: 1.96; 95%-CI: 1.51-2.56; P-value<0.001). One of eleven meta-analyses evaluating the risk for SLE associated with OC exposure had a marginally significant result. There were no associations between HRT or OC exposure and specific outcomes of SLE. It was not always possible to Meta-analyze all the available data. There was a wide heterogeneity of SLE outcome measurements and estrogen therapy administration. Conclusion: An association between HRT exposure and SLE causality was observed. No association was found when analyzing the risk for SLE among OC users, however since women with high disease activity/Thromboses or antiphospholipid-antibodies were excluded from most of the studies, caution should be exercised in interpreting the present results. To identify risk factors that predispose healthy individuals to the development of SLE who are planning to start HRT or OC is suggested. © 2014 Rojas-Villarraga et al.
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Phospholipid antibody , Oral contraceptive agent , Case control study , Comparative study , Cross-sectional study , Disease activity , Disease association , Disease predisposition , Drug contraindication , Drug efficacy , Drug exposure , Drug safety , Effect size , Estrogen therapy , Evidence based medicine , Hormone substitution , Human , Menopausal syndrome , Meta analysis , Oral contraceptive use , Outcome assessment , Prospective study , Randomized controlled trial (topic) , Retrospective study , Review , Risk assessment , Risk benefit analysis , Risk factor , Sensitivity analysis , Systematic review , Systemic lupus erythematosus , Thrombosis , Adult , Chemically induced , Estrogen therapy , Female , Infertility, Female , Lupus Erythematosus, Systemic , Middle aged , Pathology , Risk , Adult , Case-Control Studies , Contraceptives, Oral , Estrogen Replacement Therapy , Estrogens , Humans , Infertility, Female , Middle Aged , Odds Ratio , Prospective Studies , Retrospective Studies , Risk
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