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 participants | Number of fallers/total treated | Number of fallers/total control | Effect relative risk | Lower 95% CI | Upper 95% CI | Q test P value | I2 | Fall reduction |
|---|---|---|---|---|---|---|---|---|---|
| Broe et al, 2007w1(200) (200 IU D2) | 51 | 15/26 | 11/25 | 1.31 | 0.76 | 2.27 | — | — | — |
| Broe et al, 2007w1(400) (400 IU D2) | 50 | 15/25 | 11/25 | 1.36 | 0.79 | 2.35 | — | — | — |
| Broe et al, 2007w1(600) (600 IU D2) | 50 | 15/25 | 11/25 | 1.36 | 0.79 | 2.35 | — | — | — |
| Graafmans et al, 1996w8 (400 IU D3) | 354 | 62/177 | 66/177 | 0.94 | 0.71 | 1.24 | — | — | — |
| Primary pooled analysis (w1(200,400,600),w8) | 505 | 107/253 | 99/252 | 1.10 | 0.89 | 1.35 | 0.42 | 0% | +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.