| Variable | Included 1,729 (71.9) |
Excluded 677 (28.1) |
p-value |
|---|---|---|---|
| Age | 67.9 ± 5.3 | 69.0 ± 5.4 | <0.001 |
| Female Sex (%) | 1,065 (61.6) | 438 (64.7) | 0.17 |
| Education | |||
| < High School | 306 (17.7) | 167 (25.0) | |
| Some College | 403 (23.3) | 177 (26.5) | |
| College | 344 (19.9) | 113 (17.1) | <0.001 |
| >College | 676 (39.1) | 207 (31.4) | |
| Yearly Income >$50,000 | 919 (55.5) | 303 (48.6) | 0.003 |
| Marital Status | 1,168 (67.6) | 425 (63.6) | 0.07 |
| Race | |||
| White | 1,445 (83.6) | 533 (79.0) | |
| Black | 247 (14.3) | 115 (17.0) | 0.005 |
| Other | 37 (2.1) | 27 (4.0) | |
| WOMAC Right | 11.1 ±13.4 | 14.2±16.0 | <0.001 |
| WOMAC Left | 10.8 ± 14.6 | 14.2 ± 16.6 | <0.001 |
| Charlson Comorbidity | 0.43 ± 0.86 | 0.55 ± 1.0 | 0.004 |
| Medication Number | 3.78 ± 2.43 | 4.03 ± 2.57 | 0.04 |
| Smoker (yes/no) | 858 (49.9) | 332 (50.2) | 0.93 |
| Radiographic Knee OA Present/Absent |
447 (29.6) | 230 (25.7) | 0.04 |
| Hip Pain (yes/no) | 187 (10.8) | 89 (13.2) | 0.14 |
| 20M Gait Speed, m/s | 1.30 ± 0.21 | 1.25 ± 0.22 | <0.001 |
| PASE | 141.5 ± 67.1 | 127.4 ± 68.3 | <0.001 |
| SF-12 | |||
| Total | 104.4 ± 10.1 | 100.2 ±12.9 | <0.001 |
| Physical | 49.3 ± 8.3 | 45.8 ± 10.3 | <0.001 |
| Mental | 55.1 ± 7.1 | 54.4 ± 8.4 | 0.06 |
All values represent mean ± SD, or count (%)
P-value represents the difference between the excluded and included analytical cohort
PASE - Physical Activity Scale for the Elderly; SF - Short Form 12; WOMAC – Western Ontario and McMaster University Arthritis Index