Table 4.

Multivariable analysis of risk factors for development of overgrowth of the affected limb in overall patients

	FHHD > 10 mm		FHHD > 15 mm
Risk factors	RR (95% CI)	p-value	RR (95% CI)	p-value
Age at reduction	1.0 (1.0–1.0)	0.8	1.0 (1.0–1.1)	0.6
Initial severity
Tőnnis grade ≥ III	1.0 (0.6–1.5)	0.8	0.8 (0.4–1.7)	0.6
AI at reduction	1.0 (1.0–1.0)	0.6	0.9 (0.9–1.0)	0.1
Reduction method
Anterolateral OR	1.6 (1.0–2.8)	0.08	2.4 (1.0–5.9)	0.06
Femoral osteotomy	1.6 (1.0–2.5) a	0.03	2.3 (1.2–4.5) a	0.02

^aStatistically significant.

FHHD = femoral head height difference; RR = relative risk;

CI = confidence interval; AI = acetabular index; OR = open reduction.