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Table 1 Comparison of the degree of hip flexion contracture between the hip flexion contracture and no significant contracture groups

From: Sustained hip flexion contracture after femoral lengthening in patients with achondroplasia

Hip FC (°) Hip FC group (n = 13) No significant contracture group (n = 21) p-value
Before surgery 6.3 (5–7)* 1.8 (0–5)* 0.005†
During the distraction osteogenesis
 Latency period 25.0 (10–35)* 23.7 (8–33)* 0.740
 Lengthening period (early) 19.5 (0–25)* 14.5 (0–20)* 0.619
 Lengthening period (end) 38.7 (32–42)* 20.3 (5–25)* <  0.001†
 Consolidation period 33.7 (30–35)* 6.8 (0–15)* <  0.001†
 Final follow-up 2.0 (0–5)* 1.3 (0–3)* 0.459
  1. FC flexion contracture
  2. *Data presented in parenthesis represent the range
  3. †Statistically significant