PMC

Study selection flow chart according to QUOROM guidelines.

Forest plot comparing the risk of falling in vitamin D treated groups and control groups in the primary (above) and post-hoc (below) analyses. Squares represent the relative risk (RR) of falling in the treated groups versus those in control groups. The size of the square is proportional to the size of the trials, and error bars represent the 95% confidence intervals (CI). The diamond shape represents the pooled relative risk, which was 0.86 (95% CI, 0.79-0.93) for the 10 studies in primary analysis and 0.92 (95% CI, 0.87-0.98) for the 17 studies in post-hoc analysis, which included 7 additional studies that did not have explicit fall definitions. Note that pooled numbers in post-hoc analysis do not include Porthouse et al. (2005) since this study only reported a relative risk of falling. Relative weight (%) of each study in pooled analysis is also indicated.