Fig. 6. Forest plot of secondary-analysis for long acting BDZ users compared to short/medium acting BDZ users. Long acting BDZ users have non significantly higher risk of dementia compared to short acting BDZ users. Forest plot representing pooled estimate of RR and 95% CIs based half-life of BDZ. Squares indicate RR in each study. The square size is proportional to the weight of the corresponding study in the meta-analysis; the length of horizontal lines represents the 95% CI. The diamond indicates the pooled RR and 95% CI (random-effects model). BDZ: benzodiazepines, CI: confidence interval, RR: relative risk.