Table 3.

Clinical characteristics of different groups of preoperative CCI.

	Pre-op CCI = 0	Pre-op CCI = 1	Pre-op CCI = 2	Pre-op CCI ≥ 3	p
n	101	113	105	149
Age	45.28 ± 7.91	55.16 ± 7.98	62.76 ± 5.44	70.1 ± 7.72	<0.001
BMI	23.44 ± 3.16	23.10 ± 2.71	23.83 ± 3.18	23.27 ± 3.04	>0.05
Pre-operative diagnosis
ONFH	39	48	32	12
DDH	23	19	15	18
Primary osteoarthritis	8	17	38	69
Rheumatoid arthritis	13	14	9	26
Fracture of femoral neck	2	5	7	24
Legg-Calve-Perthes disease	8	6	2	0
Ankylosing spondylitis	8	4	2	0
Pre-operative comorbidities
Myocardial infarction	0	5	9	19
Congestive Heart Failure	0	8	16	23
Peripheral vascular disease	0	16	13	31
Cerebrovascular disease	0	7	15	29
Chronic Lung Disease	0	25	32	79
Peptic ulcer	0	13	27	39
Mild liver disease	0	21	11	49
Diabetes mellitus (without comorbidities)	0	18	17	36
paralysis	0	0	5	17
Moderate to severe kidney disease	0	0	14	27
Diabetes mellitus (with comorbidities)	0	0	16	47
Moderate to severe liver disease	0	0	0	26
HIV	0	0	0	2