Passive smoking and cervical cancer risk: a meta-analysis based on 3,230 cases and 2,982 controls.

Objective: Passive smoking has been considered as a risk factor of many cancers. To examine whether it might also pose a risk for cervical cancer, we performed a meta-analysis based on published case-control studies.

Methods: We searched the PubMed database and references of included studies up to February 10th, 2012 for relevant studies.