Table 3

Primary pooled analysis for low doses of supplemental vitamin D (<700 IU) and the prevention of falls

Study (daily dose of vitamin D)Number of participantsNumber of fallers/total treatedNumber of fallers/total controlEffect relative riskLower 95% CIUpper 95% CIQ test P valueI2Fall reduction
Broe et al, 2007w1(200) (200 IU D2)5115/2611/251.310.762.27
Broe et al, 2007w1(400) (400 IU D2)5015/2511/251.360.792.35
Broe et al, 2007w1(600) (600 IU D2)5015/2511/251.360.792.35
Graafmans et al, 1996w8 (400 IU D3)35462/17766/1770.940.711.24
Primary pooled analysis (w1(200,400,600),w8)505107/25399/2521.100.891.350.420%+10% (ns)

Q test: P<0.100 indicates heterogeneity.

I2 estimates above 25% are considered to represent modest heterogeneity, and values above 50% represent large heterogeneity beyond chance.

ns=not significant.