Ontology highlight
ABSTRACT: Objective
Since conflicting results have been published on the role of tobacco smoking on the risk of endometriosis, we provide an up-to-date summary quantification of this potential association.Design
We performed a PubMed/MEDLINE search of the relevant publications up to September 2014, considering studies on humans published in English. We searched the reference list of the identified papers to find other relevant publications. Case-control as well as cohort studies have been included reporting risk estimates on the association between tobacco smoking and endometriosis. 38 of the 1758 screened papers met the inclusion criteria. The selected studies included a total of 13,129 women diagnosed with endometriosis.Setting
Academic hospitals.Main outcome measure
Risk of endometriosis in tobacco smokers.Results
We obtained the summary estimates of the relative risk (RR) using the random effect model, and assessed the heterogeneity among studies using the ?(2) test and quantified it using the I(2) statistic. As compared to never-smokers, the summary RR were 0.96 (95% CI 0.86 to 1.08) for ever smokers, 0.95 (95% CI 0.81 to 1.11) for former smokers, 0.92 (95% CI 0.82 to 1.04) for current smokers, 0.87 (95% CI 0.70 to 1.07) for moderate smokers and 0.93 (95% CI 0.69 to 1.26) for heavy smokers.Conclusions
The present meta-analysis provided no evidence for an association between tobacco smoking and the risk of endometriosis. The results were consistent considering ever, former, current, moderate and heavy smokers, and across type of endometriosis and study design.
SUBMITTER: Bravi F
PROVIDER: S-EPMC4275697 | biostudies-literature | 2014 Dec
REPOSITORIES: biostudies-literature
Bravi Francesca F Parazzini Fabio F Cipriani Sonia S Chiaffarino Francesca F Ricci Elena E Chiantera Vito V Viganò Paola P La Vecchia Carlo C
BMJ open 20141222 12
<h4>Objective</h4>Since conflicting results have been published on the role of tobacco smoking on the risk of endometriosis, we provide an up-to-date summary quantification of this potential association.<h4>Design</h4>We performed a PubMed/MEDLINE search of the relevant publications up to September 2014, considering studies on humans published in English. We searched the reference list of the identified papers to find other relevant publications. Case-control as well as cohort studies have been ...[more]