Effect of tobacco smoking on the risk of developing community acquired pneumonia: A systematic review and meta-analysis
Fig 8
Meta-analysis of incidence of community acquired pneumonia in ex-smokers relative to never smokers (Hazards Ratio).
Grey box = effect estimates from single studies. Diamond = pooled result with confidence interval. Vertical line at ‘1’ on the x-axis is the line of no effect. Weight (in %) = influence an individual study had on the pooled result.