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Summary of HO incidence and HO severity stratified by group, including calculated severity scores.
| Variable | Group A (n = 42) | Group B (n = 42) |
|---|---|---|
| HO incidence (any grade) | 6/42 (14.3%) | 15/42 (35.7%) |
| Mild HO (G1-G2A) | 5/6 (83.3%) | 6/15 (40%) |
| Moderate HO (G2B) | 1/6 (16.7%) | 1/15 (6.7%) |
| Severe HO (G2C-G3) | 0/6 (0%) | 8/15 (53.3%) |
| Mean HO severity score | 1.33 | 2.93 |
HO, heterotopic ossification.
