Outcomes of the conservative hip preservation treatment in patients with osteonecrosis of the femoral head: With 4-year follow-up

Table 10 Clinical scores after conservative hip preservation treatment for osteonecrosis of the femoral head based on collapse degree

Items	≤ 2 mm	> 2 mm	t/Z	P value
Harris	75.00 (93.00, 65.25)	82.00 (93.00, 71.50)	-1.096	0.2731
iHOT-12	99.82 ± 13.41	107.24 ± 10.24	-2.172	0.032
WOMAC	38.06 (64.75, 30.50)	38.06 ± 19.03	-1.592	0.1111
VAS	3.00 (4.00, 2.00)	3.00 (3.00, 0.00)	-1.267	0.2051

¹Refers to the Mann-Whitney U test.

iHOT-12: International Hip Outcome Tool 12; WOMAC: Western Ontario and McMaster Universities Arthritis Index; VAS: Visual analogue scale.