Table 2 Graf classification in term and preterm infants of the birth cohort
Term (n = 2,534) | Preterm (n = 376) | |||
|---|---|---|---|---|
Type | Left hip | Right hip | Left hip | Right hip |
I a | 1,449 (57.2%) | 1,462 (57.7%) | 296 (78.7%) | 302 (80.3%) |
II a | 1,052 (41.5%) | 1,041 (41.1%) | 78 (20.5%) | 72 (18.9%) |
II c | 21 (0.8%) | 20 (0.8%) | 1 (0.3%) | 0 (0.0%) |
D | 8 (0.3%) | 9 (0.4%) | 1 (0.3%) | 2 (0.5%) |
III a | 2 (0.2%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) |
IV | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) |