Table 1.
Demographic and medical characteristics by experimental group.
| Control group (N = 128) |
Treatment group (N = 129) |
P for difference between groups | |||
|---|---|---|---|---|---|
| n* | Mean (SD) or % | n* | Mean (SD) or % | ||
| Age | 128 | 66.37 (10.26) | 129 | 68.00 (8.67) | .17 |
| Years with osteoarthritis | 121 | 13.59 (9.09) | 128 | 13.95 (10.63) | .77 |
| Body mass index | 123 | 32.87 (8.00) | 124 | 33.77 (8.24) | .38 |
| Disease severity (K–L grading) | 122 | 125 | .22 | ||
| 0 to 1 | 27.0% | 16.8% | |||
| >1 to 2 | 20.5% | 27.2% | |||
| >2 to 3 | 23.0% | 26.4% | |||
| >3 to 4 | 29.5% | 29.6% | |||
| Female | 128 | 78.9% | 129 | 74.4% | .40 |
| White race | 128 | 85.9% | 129 | 87.6% | .69 |
| Married/living with partner | 123 | 62.6% | 126 | 64.3% | .78 |
| Education | 126 | 127 | .18 | ||
| High school graduate | 27.0% | 28.4% | |||
| College graduate | 56.4% | 46.5% | |||
| Master’s degree | 16.7% | 25.2% | |||
| Currently employed | 121 | 39.7% | 128 | 21.1% | .001 |
| Currently on disability | 125 | 15.2% | 128 | 13.3% | .66 |
| Current smoker | 126 | 5.6% | 127 | 7.1% | .62 |
| Past smoker | 123 | 52.9% | 127 | 54.3% | .81 |
| Regular exercise | 121 | 49.6% | 124 | 45.2% | .49 |
| Treatment for psychiatric disorder | 126 | 15.1% | 128 | 16.4% | .77 |
| Treatment for drugs | 125 | 1.6% | 128 | 0.0% | .15 |
| Memory/thinking problems | 125 | 9.6% | 126 | 10.3% | .85 |
| Surgery for osteoarthritis | 121 | 33.9% | 124 | 29.0% | .41 |
| Affected joint is knee (vs hip) | 128 | 73.4% | 129 | 81.4% | .13 |
*
Numbers indicate available sample size for each variable.