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Demographics.
| Variables | |
|---|---|
| Total (male/female), n | 60 (37/23) |
| Age, mean ± SD (range), y | total: 26 ± 7 (20–55) |
| knee: 25 ± 4 (20–31) | |
| ankle: 26 ± 5 (20–35) | |
| hip: 26 ± 5 (20–35) | |
| shoulder: 27 ± 10 (20–55) | |
| wrist: 27 ± 8 (20–44) | |
| lumbar spine: 29 ± 11 (20–55) |
SD indicates standard deviation; y, years; n, number.
