Table 1.

Patient demographics in the two groups

Variable	AVNFH (n = 160)	Control (n = 165)	P value
Age (years)	75.2 ± 13.37	73.0 ± 11.97	0.12*a
Sex (M:F)	68:92	74:91	0.67*b
ASA scale, no.			0.22*c
I	23	18
II	41	37
III	67	76
IV	29	34
V	0	0
Laterality (L/R)	93/67	89/76	0.45*b
BMI (kg/m2)	26.2 ± 5.62	24.6 ± 6.50	0.19*a
FNBMD	2.3 ± 0.91	2.4 ± 1.06	0.09*a
Garden classification (no.)			0.15*c
I	13	23
II	35	34
III	43	48
IV	69	60

AVNFH avascular necrosis of the femoral head, ASA American Society of Anesthesiologists, BMI body mass index, FNBMD femoral neck bone mineral density

^*No statistically significant values

^aAnalysed using an independent samples t test

^bAnalysed using the chi-square

^cAnalysed using the Mann–Whitney test