Comparison of data for patients having stable and unstable slips
| Characteristics | Stable n = 73 | Unstable n = 14 | p value |
|---|---|---|---|
| Mean age (and range), yr | 12.4 (5–17) | 12.8 (10–16) | 0.783 |
| Males, no. (and %) | 49 (67) | 7 (50) | 0.238 |
| Females | 24 (33) | 7 (50) | |
| Mean weight, kg | 73.2 | 67.5 | 0.796 |
| Slip occurred on right side, cases | 20 | 6 | 0.487 |
| Left side | 34 | 8 | |
| Bilateral | 19 | 0 | |
| Mean follow-up (and range), mo | 33 (24–96) | 35 (24–72) | 0.654 |
| Trauma, no. of cases (and %) | 11 (15) | 11 (78.6) | 0.036 |
| Complications, no. (and %) | 15 (20) | 5 (36) | 0.030 |
| Avascular necrosis, no. (and %) | 1 (1.4) | 3 (21.4) | 0.001 |
| Range of motion, degrees | |||
| Flexion | 120 | 108 | 0.008 |
| Extension | −0.14 | 2 | 0.004 |
| Abduction | 46.9 | 29.5 | 0.641 |
| Internal rotation | 24.4 | 22.3 | 0.745 |
| External rotation | 57.4 | 49.6 | 0.002 |