| Variable | Overall N = 8,1161 |
Follow-up N = 7,7161 |
No Follow-up N = 4001 |
|---|---|---|---|
| Age (years) | 9.1 (3.4) | 8.9 (3.3) | 11.4 (4.1) |
| Sex | |||
| F | 3,428 / 8,116 (42%) | 3,242 / 7,716 (42%) | 186 / 400 (47%) |
| M | 4,688 / 8,116 (58%) | 4,474 / 7,716 (58%) | 214 / 400 (54%) |
| Missing | 0 / 8,116 (0%) | 0 / 7,716 (0%) | 0 / 400 (0%) |
| Primary Diagnosies | |||
| Cerebral palsy | 6,602 / 8,116 (81%) | 6,468 / 7,716 (84%) | 134 / 400 (34%) |
| Developmental variants | 324 / 8,116 (4.0%) | 222 / 7,716 (2.9%) | 102 / 400 (26%) |
| Genetic disorder | 262 / 8,116 (3.2%) | 208 / 7,716 (2.7%) | 54 / 400 (14%) |
| Other | 928 / 8,116 (11%) | 818 / 7,716 (11%) | 110 / 400 (28%) |
| Diagnosis Modifier | |||
| Diplegia | 4,178 / 8,116 (51%) | 4,124 / 7,716 (53%) | 54 / 400 (14%) |
| Femoral anteversion | 106 / 8,116 (1.3%) | 94 / 7,716 (1.2%) | 12 / 400 (3.0%) |
| Hemi/Quad/Triplegia | 2,836 / 8,116 (35%) | 2,744 / 7,716 (36%) | 92 / 400 (23%) |
| Missing | 326 / 8,116 (4.0%) | 256 / 7,716 (3.3%) | 70 / 400 (18%) |
| Other | 514 / 8,116 (6.3%) | 356 / 7,716 (4.6%) | 158 / 400 (40%) |
| Paraparesis | 156 / 8,116 (1.9%) | 142 / 7,716 (1.8%) | 14 / 400 (3.5%) |
| Mean Number of Prior Procedures | 2.9 (3.1) | 3.0 (3.1) | 2.1 (2.6) |
| Mean Propensity Score (Likelihood of Any Surgery) | |||
| Low | 2,706 / 8,116 (33%) | 2,485 / 7,716 (32%) | 221 / 400 (55%) |
| Medium | 2,705 / 8,116 (33%) | 2,608 / 7,716 (34%) | 97 / 400 (24%) |
| High | 2,705 / 8,116 (33%) | 2,623 / 7,716 (34%) | 82 / 400 (21%) |
| 1 Mean (SD); n / N (%) | |||