Table 3.

Description of femoral head collapse according to the characteristics of interest and result of association analyses.

Variable	Head collapse		OR	CI (95%)		p
	No (n = 8)	Yes (n = 22)		Inferior	Superior
Ficat and Arlet, n (%)						0.088
1	5 (45.5)	6 (54.5)	1.00
2A	3 (15.8)	16 (84.2)	4.44	0.80	24.61
Early improvement of symptoms, n (%)						0.466
No	2 (40)	3 (60)	1.00
Yes	6 (24)	19 (76)	2.11	0.28	15.77
Indication of THA, n (%)						0.030
No	7 (46.7)	8 (53.3)	1.00
Yes	1 (6.7)	14 (93.3)	12.25	1.27	118.36
Persistence of risk factor, n (%)						0.866
No	3 (25)	9 (75)	1.00
Yes	5 (27.8)	13 (72.2)	0.87
Alteration in the Merle d’Aubigne and Postel			1.20	0.90	1.59	0.210
Mean ± SD	2.4 ± 3.2	3.9 ± 2.7
Median (min; max)	3 (−4; 5)	4 (−2; 7)

Multivariate logistic regression.