Table 1 Baseline characteristics of the overall preoperative TKA cohort, and stratified by area-level socioeconomic status (SES)
Characteristics | Overall cohort | SES 1 | SES 2 | SES 3 | p-value* |
|---|---|---|---|---|---|
|  | N = 316 | N = 85 | N = 87 | N = 144 |  |
Age – mean (SD) | 65.9 (8.7) Median: 65.8 | 63.2 (8.0) | 65.6 (9.8) | 67.6 (8.1) | <0.01 |
Sex: Female – n (%) | 186 (59) | 52 (61) | 50 (57) | 84 (58) | 0.89 |
Race: Caucasian – n (%) | 278 (88) | 65 (76) | 78 (90) | 135 (94) | <0.01 |
BMI – mean (SD) | 30.5 (6.3) Median: 29.6 | 32.5 (6.9) | 31.0 (6.5) | 28.9 (5.4) | <0.01 |
Current smokers – n (%) | 24 (8) | 10 (12) | 2 (2) | 12 (8) | 0.04 |
Educational attainment – n (%) |  |  |  |  | 0.01 |
Less than college | 53 (17) | 22 (26) | 15 (17) | 16 (11) | Â |
Some college | 65 (21) | 20 (24) | 22 (26) | 23 (16) | Â |
College graduates | 195 (62) | 43 (51) | 49 (57) | 103 (73) | Â |
Mental Health Index Score – mean (SD) | 76.2 (17.2) Median: 80 | 73.6 (18.0) | 74.8 (17.8) | 78.5 (16.2) | 0.06 |