Table I.
The characteristics of the patients at the time of arthroplasty in the study.
| Characteristic | Total | No prior depression or anxiety | Prior depression or anxiety | p-value |
|---|---|---|---|---|
| Arthroplasties, n | 21,469 | 14,708 | 6,761 | |
| Mean age, yrs (SD) | 68 (12) | 69 (12) | 67 (13) | < 0.001 |
| Female, n (%) | 12,209 (57) | 7,495 (51) | 4,714 (70) | < 0.001 |
| Mean BMI, kg/m2 (SD) | 31 (7) | 31 (7) | 32 (7) | < 0.001 |
| Smoking status, n (%) | < 0.001 | |||
| Active | 1,024 (4.8) | 575 (3.9) | 449 (6.6) | |
| Never/former | 13,077 (61) | 8,452 (58) | 4,625 (68) | |
| Unknown | 7,368 (34) | 5,681 (39) | 1,687 (25) | |
| Operation, n (%) | 0.001 | |||
| THA | 10,011 (47) | 6,968 (47) | 3,043 (45) | |
| TKA | 11,458 (53) | 7,740 (53) | 3,718 (55) | |
| Mean year of surgery (SD) | 2010 (5) | 2009 (5) | 2011 (5) | < 0.001 |
SD, standard deviation; THA, total hip arthroplasty; TKA, total knee arthroplasty.