The Role of Immune Regulatory Cells in Nontraumatic Osteonecrosis of the Femoral Head: A Retrospective Clinical Study

Table 2

Demographic data of the ONFH group and the control group.

	ONFH group (n = 67)	Control group (n = 58)	value
Age (years)	43.6 ± 12.9	47.3 ± 9.3	0.067
Gender (male/female)	52/15	43/15	0.650
Height (cm)	170.7 ± 7.5	169.2 ± 5.6	0.204
Weight (kg)	70.3 ± 10.8	68.8 ± 13.9	0.523
BMI (kg/m^2)	24.1 ± 3.3	25.4 ± 4.3	0.070