Effect of knee osteoarthritis on the postoperative outcome of proximal femoral nail anti-rotation in the treatment of intertrochanteric fractures in the elderly: a retrospective analysis

Table 1 Patient demographics and outcomes in both group

Variable	Control group(n = 133)	KOA group(n = 121)	P value
Gender, M/F	50/83	46/75	0.945
Age(years)			0.504
60–69	39	33
70–79	59	49
80–89	28	34
≥ 90	7	5
Side, L/R	61/72	62/59	0.392
obesity	73/60	72/49	0.458
AO type of fracture			0.376
31 A1	35	24
31 A2	72	67
31 A3	26	30
Comorbidities			0.114
Cardiovascular	20	22
Pulmonary	13	9
Digestive	8	9
Endocrinologic	12	18
Urologic	2	4
Time from injury to operation			0.973
< 1 day	25	22
1–2 days	61	59
2–3 days	32	27
> 3 days	15	13
ASA			0.331
I	31	26
II	68	52
III	28	33
IV	6	10
Follow up(months)	18.0 ± 3.4	17.5 ± 3.3	0.205

Abbreviation: KOA knee osteoarthritis; ASA American Society of Anesthesiologists

ISSN: 1471-2474