Table 1.
Comparison of demographic and clinical data between patients who did and did not report depression.
| Depression = yes | Depression = no | P value | |
|---|---|---|---|
| (n = 58) | (n = 417) | ||
| Mean age and SD (range) | 62.7 ± 9.9 (37 to 86) | 65.0 ± 10.1 (33 to 89) | 0.105 |
| Percentage of female patients | 82.5 | 53.5 | <0.001 |
| Percentage of patients without any formal education beyond high school | 27.6 | 30.8 | 0.618 |
| Percentage of patients awaiting knee (versus hip) replacement | 62.1 | 55.6 | 0.355 |
| Mean body mass index in kg/m2 and SD (range) | 33.5 ± 8.7 (21 to 62) | 29.9 ± 6.3 (19 to 55) | <0.001 |
| Mean number of comorbidities and SD (range) | 2.7 ± 1.7 (0 to 7) | 1.7 ± 1.3 (0 to 7) | <0.001 |
| Mean WOMAC pain score and SD in points (range) | 10.2 ± 4.2 (0 to 20) | 9.6 ± 3.7 (1 to 18) | 0.238 |
| Mean WOMAC function score and SD in points (range) | 34.7 ± 13.7 (0 to 68) | 31.6 ± 12.1 (0 to 62) | 0.073 |
| Mean number of painful joints and SD (range) | 7.3 ± 4.7 (1 to 20) | 4.1 ± 3.1 (1 to 18) | <0.001 |
SD: standard deviation; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.