Age at Menarche, Level of Education, Parity and the Risk of Hysterectomy: A Systematic Review and Meta-Analyses of Population-Based Observational Studies
Fig 2
Forest plots displaying results from meta-analyses of the association between each year older at menarche and hysterectomy (random-effects model) for studies reporting: (a) hazard ratios (HR) and, (b) odds ratios (OR).
Squares represent study-specific estimates (the size of the square reflects the study-specific statistical weight); horizontal lines represent 95% confidence intervals (CI); diamonds represent the summary estimate with corresponding 95% confidence interval. See Table 1 for details of Study abbreviations.