Mortality following proximal femoral fractures in elderly patients: a large retrospective cohort study of incidence and risk factors

Table 5 Risk factors of mortality in intertrochanteric fractures according to multivariable-adjusted Cox regression analysis

	Multivariable Cox Regression
	Hazard Ratio	95% CI	P-value
Sex
Female	1.07	0.82–1.40	0.59
Age
70–79	1.35	0.92–1.96	0.11
≥ 80	1.40	1.01–1.94	0.04
AO type
31A2	1.00	0.74–1.37	0.95
31A3	0.73	0.50–1.06	0.73
Treatment
Bipolar	0.61	0.39–0.95	0.02
ORIF by plate	1.34	1.11–1.70	0.01
Screw	1.60	0.80–3.21	0.80
Delay to surgery
2–7 day	1.02	1.00–1.35	0.01
> 7 days	1.05	0.60–1.41	0.34
ASA score
3–4	1.11	1.05–1.27	0.04

The presented data is compared to the baseline category as reference for each comparison, which is not shown. Significant P values are inbold

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