Intramedullary core decompression combined with endoscopic intracapsular decompression and debridement for pre-collapse non-traumatic osteonecrosis of the femoral head

Table 1 Comparison of general data between the two groups

Characteristics	Group A	Group B	t/χ²	P
Total number (patients/hips), n	41/59	60/80	0.0825	0.7739
Gender (male/female), n	25/16	34/26	0.1862	0.6661
Age (years), mean ± SD	35.5 ± 9.8	37.7 ± 10.5	1.0621	0.2908
BMI (mean ± SD, kg/m²)	23.5 ± 2.3	22.9 ± 2.6	1.1925	0.2359
Type (alcohol/steroid/idiopathic), n	11/16/14	17/23/20	0.1566	0.9863
ARCO Stage (I/II), n	18/41	21/59	0.3051	0.5807
Unilateral/bilateral, n	23/18	40/20	1.1593	0.2816
VAS, mean ± SD	6.3 ± 2.1	6.6 ± 2.5	0.7474	0.4561
Harris score, mean ± SD	59.5 ± 11.6	57.7 ± 9.5	1.0046	0.3168
JIC (Type A/B/C)	29/22/8	37/28/15	3.7704	0.1518
Modified Kerboul angle			0.3403	0.8435
≤ 190°	21	26
190°–240°	31	42
≥ 240°	7	12

ISSN: 1749-799X