evidencegaps
Primary study · included by 1 review

Secondhand smoking increases bladder cancer risk in nonsmoking population: a meta-analysis.

Yan 2018 · Yan Huaqing, Ying Yufan, Xie Haiyun, et al. · Cancer management and research · 2018

Included by

Bladder cancer risk factors: a comprehensive umbrella review of meta-analyses.
Non-Cochrane · aetiology · 2026 · cited as Yan 2018 · Table 1 (Included MA); References
Outcome this study informsPooled effectEvidenceCertainty
Risk of bladder cancer
With secondhand smoking vs Without secondhand smoking
RR 1.22 [1.06, 1.40]14 studies · 325264 participantsVery low
Risk of bladder cancer
Healthiest lifestyle vs Least healthy lifestyle
HR 0.83 [0.76, 0.91]2 studiesVery low

1 including review in total.