Outcomes | Tai chi | Wait list | Adjusted RRR (95% CI) | NNT (CI) |
⩾1 fall at 16 weeks | 18% | 21% | 26% (−3 to 47) | Not significant |
⩾2 falls at 16 weeks | 2.3% | 4.5% | 75% (17 to 92) | 31 (25 to 135) |
⩾1 fall at 24 weeks | 20% | 24% | 31% (7 to 50) | 14 (9 to 60) |
⩾2 falls at 24 weeks | 4.3% | 8.0% | 72% (40 to 88) | 18 (15 to 32) |
Adjusted IRR | ||||
Number of falls at 16 weeks | 69 | 94 | 0.73 (0.50 to 1.07)† | |
Number of falls at 24 weeks | 86 | 126 | 0.67 (0.47 to 0.94) |
*IRR = incidence rate ratio; other abbreviations defined in glossary. RRR, NNT, and CI calculated from data in article. Adjusted for age, sex, previous falls history, venue, baseline adequate physical activity, and baseline sway on mat.
†Not significant.