Number needed to treat and standardized mean difference for ADL and Pain subscales.
| Measure | EX + EP | EP | NNT† | ||
|---|---|---|---|---|---|
| N | n (%) | N | n (%) | Estimate (95% CI)§ | |
| ADL improvement | |||||
| All patients | 84 | 28 (33) | 81 | 15 (19) | 7 (4, 72) |
| Knee OA | 41 | 10 (24) | 40 | 8 (20) | 23 (5, −7) |
| Hip OA | 43 | 18 (42) | 41 | 7 (17) | 4 (2, 19) |
| Pain improvement | |||||
| All patients | 84 | 29 (35) | 81 | 16 (20) | 7 (4, 86) |
| Knee OA | 41 | 13 (32) | 40 | 10 (25) | 15 (4, −8) |
| Hip OA | 43 | 16 (37) | 41 | 6 (15) | 4 (2, 27) |
↵† NNT: number needed to treat. Calculated as 1/(EER-CER), where CER is the event rate in the control group and EER is the event rate in the exercise group, with the event being at least a 15% improvement.
↵§ CI are calculated by reciprocal transformation of risk difference CI. EX + EP: 8 weeks exercise intervention plus educational package; EP: educational package alone; OA: osteoarthritis; ADL: Activities of Daily Living.