Skip to main content

Table 3 Meta-analysis of night work and breast cancer

From: The relationship between night work and breast cancer

Authors (years) Overall OR or RR (95% CI) Night work exposure category
Megdal et al. (2005) [34] 1.51 (1.36–1.68) Ever
Jia et al. (2013) [35] 1.20 (1.08–1.33) Ever
1.15 (1.03–1.29) ≥ 15 years
Kamdar et al. (2013) [36] 1.21 (1.00–1.47) Ever
1.04 (0.92–1.18) ≥ 8 years
Wang et al. (2013) [37] 1.19 (1.05–1.35) Ever
1.03 (1.01–1.05) Every 5 years of exposure increased
Ijaz et al. (2013) [38] 1.05 (1.01–1.10) Every 5 years of exposure increased
Travis et al. (2016) [39] 0.99 (0.95–1.03) Ever
1.01 (0.93–1.10) ≥ 20 years
1.00 (0.87–1.14) ≥ 30 years
  1. OR Odds ratio, RR Relative risk