Skip to main content

Table 2 Pooled ORs and 95% CI for the association between ever versus never smoking and risk of meningioma in women, according to selected subgroups

From: A decreased risk of meningioma in women smokers was only observed in American studies rather than studies conducted in other countries: a systematic review and meta-analysis

Subgroups No. of studies OR (95% CI) I2 P
Overall 7 0.83 (0.7–0.98) 45.9 0.089
Target population     
 Female 2 0.75 (0.53–1.07) 61.1 0.109
 Male + female 5 0.88 (0.69–1.13) 53.0 0.075
Area     
 USA 3 0.77 (0.68–0.87) 1.5 0.362
 Europe and Canada 2 0.88 (0.73–1.07) 0 0.686
 Asia 2 1.21 (0.50–2.90) 80.7 0.023
Development level     
 Developed country 6 0.80 (0.73–0.88) 0 0.614
 Developing country 1 1.94 (1.04–3.62) - -
Study design     
 Cohort 1 0.87 (0.71–1.07) - -
 Case control 6 0.83 (0.66–1.04) 53.0 0.059
  Hospital-based 4 0.86 (0.62–1.19) 68.9 0.022
  Population-based 2 0.79 (0.57–1.08) 0 0.324
Smoking assessment     
 Interview 5 0.88 (0.69–1.13) 53.0 0.075
 Questionnaires 2 0.75 (0.53–1.07) 61.1 0.109
OR type     
 Crude 2 0.75 (0.53–1.07) 61.1 0.109
 Adjusted 5 0.88 (0.69–1.13) 53.0 0.075
  1. OR, odds ratio; 95% CI, 95% confidence interval