Table 2 Comparative analyses of hip flexion contracture and no significant contracture groups
From: Sustained hip flexion contracture after femoral lengthening in patients with achondroplasia
Hip FC group (n = 13) | No significant contracture group (n = 21) | p-value | |
|---|---|---|---|
Demographic data | |||
Gender | 4:9 | 8:13 | 0.665 |
Age at operation (years) | 10.6 years (6.8–14.6)* | 11.5 years (6.8–21.5)* | 0.917 |
Preoperative spinopelvic parameters | |||
PI (°) | 42.1 (36.3–50.2)* | 35.6 (30.0–47.8)* | 0.261 |
PT (°) | −2.5 (−6.7–12.2)* | − 3.6 (− 7.3–6.0)* | 0.972 |
SS (°) | 44.6 (37.4–55.6)* | 39.1 (22.1–47.0)* | 0.120 |
LL (°) | 47.1 (37.2–54.3)* | 43.2 (40.1–51.9)* | 0.484 |
SVA (mm) | 17.9 (−17–35.0) | −15.2 (− 47.0–40.0) | 0.005† |
Quantitative assessments of the femoral lengthening | |||
Initial femoral length | 23.3 cm (20.2–26.2)* | 25.2 cm (18.0–40.0)* | 0.649 |
Amount of lengthening | 10.1 cm (7.6–13.6)* | 8.1 cm (5.8–10.9)* | 0.001† |
Lengthening percentage | 43.5% (36.5–52.1)* | 33.3% (19.0–45.6)* | < 0.001† |
EFI (day/cm) | 35.7 (21.8–56.6)* | 41.4 (23.3–60.0)* | 0.309 |