Evaluation of Safety and Efficacy of Traction, Closed Reduction, and Subsequent Hip Fixation in Hilgenreiner Brace in Patients with Severe Forms of Hip Developmental Dysplasia

Table 3

Differences between patients with and without complications in the number of days that elapsed from their birth to hospital admission.

	Number of days from birth to hospital admission
	Discrepancy			Mann–Whitney U test
Occurrence of complications	N	AM	SD	U	Z
No	43	112,98	56,294	56,000	−2.227	0.026
Yes	6	380,50	516,397

AM: arithmetic mean; SD: standard deviation; U: Mann–Whitney U test; Z: standard score for Mann–Whitney U test; : level of statistical significance.