Table 1.
Demographic & socioeconomic measures across the clusters.
| Cluster 1 (n=145) |
Cluster 2 (n=101) |
Cluster 3 (n=24) |
P | |
|---|---|---|---|---|
| Age, mean ± SD years | 57.2 ± 7.4 | 55.9 ± 7.6 | 56.3 ± 7.4 | 0.402 |
| BMI, mean ± SD kg/m2 | 30.9 ± 7.1 | 32.0 ± 7.6 | 33.9 ± 9.7 | 0.151 |
| Sex, no. (%), X2 | 0.191 | |||
| Female | 98 (67.6) | 57 (56.4) | 16 (66.7) | |
| Male | 47 (32.4) | 44 (43.6) | 8 (33.3) | |
| Race, no. (%), X2 | <0.0001 | |||
| African American | 71 (49.0) | 67 (66.7) | 20 (83.3) | |
| Non-Hispanic White | 74 (51.0) | 34 (33.3) | 4 (16.7) | |
| Right Knee KL Score, no. (%), X2 | 0.208 | |||
| 0 | 76 (57.1) | 43 (47.8) | 11 (45.8) | |
| 1 | 18 (13.5) | 16 (17.8) | 3 (12.5) | |
| 2 | 20 (15.0) | 8 (8.9) | 3 (12.5) | |
| 3 | 14 (10.5) | 11 (12.2) | 4 (16.7) | |
| 4 | 5 (3.8) | 12 (13.3) | 3 (12.5) | |
| Left Knee KL Score, no. (%), X2 | 0.114 | |||
| 0 | 80 (60.2) | 44 (48.4) | 9 (37.5) | |
| 1 | 17 (12.8) | 21 (23.1) | 5 (20.8) | |
| 2 | 15 (11.3) | 13 (14.3) | 2 (8.3) | |
| 3 | 15 (11.3) | 11 (12.1) | 5 (20.8) | |
| 4 | 6 (4.5) | 2 (2.2) | 3 (12.5) | |
| Education, no (%), X2 | 0.163 | |||
| High school or less | 58 (40.0) | 57 (56.4) | 12 (50.0) | |
| 2 years of college | 33 (22.8) | 23 (22.8) | 6 (25.0) | |
| Bachelor's degree and above | 54 (37.2) | 21 (20.8) | 6 (25.0) | |
| Site, no (%), X2 | <0.0001 | |||
| University of Florida | 75 (54.7) | 73 (76.8) | 19 (82.6) | |
| University of Alabama at Birmingham | 62 (45.3) | 22 (23.2) | 4 (17.4) |