Table 1.
Descriptive Statistics by Race a
| Race | P | |||||
|---|---|---|---|---|---|---|
| Variable | White, n = 1190 | Black, n = 201 | Other, n = 72 | White vs Black | White vs Other | Black vs Other |
| Age at surgery, y | 22.0 [17.0-36.0] | 21.0 [17.0-31.0] | 24.0 [17.0-32.0] | .313 | .781 | .727 |
| Sex | .390 | .332 | .390 | |||
| Male | 620 (52.1) | 112 (55.7) | 45 (62.5) | |||
| Female | 570 (47.9) | 89 (44.3) | 27 (37.5) | |||
| Insurance type | <.001 | .005 | <.001 | |||
| Commercial | 1107 (93.0) | 116 (57.7) | 60 (83.3) | |||
| Medicaid | 83 (7.0) | 85 (42.3) | 12 (16.7) | |||
| BMI | 26.9 ± 5.61 | 28.4 ± 7.37 | 26.4 ± 4.86 | .002 | .763 | .031 |
| Years of education | 13.0 [11.0-16.0] | 12.0 [11.0-14.0] | 14.0 [11.0-16.0] | <.001 | .167 | .001 |
| Years of education by group | .198 | .336 | .198 | |||
| ≥12 | 785 (66.0) | 121 (60.2) | 52 (72.2) | |||
| <12 | 405 (34.0) | 80 (39.8) | 20 (27.8) | |||
| Smoking status | <.001 | .755 | .057 | |||
| Never | 955 (80.3) | 141 (70.1) | 57 (79.2) | |||
| Quit | 159 (13.4) | 17 (8.5) | 9 (12.5) | |||
| Current | 76 (6.4) | 43 (21.4) | 6 (8.33) | |||
| Baseline VR-12 MCS | 56.3 [48.1-61.3] | 53.3 [43.1-59.4] | 55.4 [47.3-60.3] | .001 | .614 | .160 |
| Meniscus root tear | >.999 | >.999 | >.999 | |||
| No | 1151 (96.7) | 195 (97.0) | 70 (97.2) | |||
| Yes | 39 (3.3) | 6 (3.0) | 2 (2.8) | |||
| Tear location | .004 | .866 | .405 | |||
| None | 606 (50.9) | 81 (40.3) | 36 (50.0) | |||
| Medial | 205 (17.2) | 32 (15.9) | 14 (19.4) | |||
| Lateral | 252 (21.2) | 49 (24.4) | 13 (18.1) | |||
| Both | 127 (10.7) | 39 (19.4) | 9 (12.5) | |||
| Baseline KOOS | ||||||
| Pain | 72.2 [58.3-83.3] | 72.2 [50.0-83.3] | 72.2 [61.1-86.1] | .412 | .563 | .412 |
| Function | 68.2 [61.4-78.0] | 68.2 [58.0-78.0] | 69.2 [58.0-78.8] | .151 | .647 | .647 |
| Extent of OA | .248 | .575 | .248 | |||
| Normal or G1 | 809 (68.0) | 123 (61.2) | 53 (73.6) | |||
| G2 | 184 (15.5) | 39 (19.4) | 10 (13.9) | |||
| G3, G4, or OCD | 197 (16.6) | 39 (19.4) | 9 (12.5) | |||
a Data are reported as median [interquartile range], n (%), or mean ± SD. Boldface P values indicate a statistically significant difference between groups compared (P < .05). BMI, body mass index; G1, G2, G3, G4, grades 1-4; KOOS, Knee injury and Osteoarthritis Outcome Score; OA, osteoarthritis; OCD, osteochondral defect; VR-12 MCS, Veterans RAND 12-Item Health Survey Mental Component Score.