Number of fallers
Sato 2005a indicated that of 158 falls during the two-year follow up period, 11 fallers were in the vitamin D group and 33 in the placebo group. This accounted for a risk ratio of 0.6 (95% CI 0.4 to 0.8) in favour of vitamin D. Sato 2011 reported that during the one-year follow-up, five people fell in the alendronate group and 14 in the alphacalcidol group. This resulted in a relative risk of 0.7 (95% CI 0.5 to 0.9) in favour of alendronate.