Table II.

Comparison of hips that underwent successful and failed closed reduction.

Variable	Successful closed reduction	Failed closed reduction	p-value*
Hips, n	35	32
Sex, males, n	7	4	0.5131
Median age at presentation, days (IQR)	69 (49 to 108)	56 (26 to 74)	0.0854
Median age at application Pavlik harness, days (IQR)	72 (50 to 110)	57 (26 to 76)	0.0784
Median time in Pavlik harness, days (IQR)	21 (11 to 35)	14 (10 to 19)	0.0316
Graf Classification at initial ultrasound, type III/type IV, n	20/13	10/22	0.0253
Median age at closed reduction, days (IQR)	188 (149 to 205)	174 (147 to 198)	0.4295

^*Fisher's exact χ 2 test for categorical variables and Mann-Whitney U test for continuous variables.

IQR, interquartile range.