Table 2.

Results of Cox regression models. Risk of mortality in terms of hazard ratios (HR) 5 years, 1 year and 30 days after hip surgery with 95% confidence interval.

Source: AOK data 2004–2019.

		5-year mortality					1-year mortality					30-day mortality
Variable		HR	p	LCI	UCI		HR	p	LCI	UCI		HR	p	LCI	UCI
Sex	Women (Ref. Men)	0.64	< 0.001	0.60	0.68		0.54	< 0.001	0.48	0.61		0.52	< 0.001	0.42	0.63
Age group	50–54	0.29	< 0.001	0.19	0.46		0.15	0.057	0.02	1.05		0.54	0.542	0.07	3.99
	55–59	0.32	< 0.001	0.25	0.41		0.57	0.076	0.31	1.06		0.18	0.091	0.02	1.31
	60–64	0.39	< 0.001	0.33	0.45		0.51	0.004	0.32	0.80		0.24	0.017	0.07	0.77
	65–69	0.52	< 0.001	0.46	0.59		0.66	0.017	0.47	0.93		0.30	0.005	0.13	0.70
	70–74	0.71	< 0.001	0.64	0.78		0.82	0.112	0.64	1.05		0.69	0.121	0.43	1.10
	75–79 (Ref.)	1.00					1.00					1.00
	80–84	1.23	< 0.001	1.14	1.34		1.21	0.038	1.01	1.46		1.02	0.921	0.73	1.42
	85–89	1.57	< 0.001	1.44	1.72		1.54	< 0.001	1.29	1.85		1.52	0.010	1.10	2.08
	90+	2.11	< 0.001	1.92	2.32		2.30	< 0.001	1.92	2.75		2.56	< 0.001	1.88	3.50
Dementia	Yes (Ref. No)	1.20	< 0.001	1.12	1.29		1.17	0.008	1.04	1.32		1.17	0.128	0.96	1.42
Parkinson’s disease	Yes (Ref. No)	1.01	0.826	0.91	1.12		0.92	0.385	0.77	1.11		1.09	0.588	0.80	1.49
Heart failure	Yes (Ref. No)	1.21	< 0.001	1.15	1.28		1.53	< 0.001	1.37	1.71		1.81	< 0.001	1.47	2.22
Stroke and/or MI	Yes (Ref. No)	1.18	< 0.001	1.11	1.25		1.15	0.009	1.04	1.29		1.26	0.016	1.04	1.52
COPD	Yes (Ref. No)	1.17	< 0.001	1.09	1.24		1.28	< 0.001	1.13	1.44		1.27	0.022	1.03	1.56
Alcohol abuse	Yes (Ref. No)	1.26	0.007	1.07	1.49		1.10	0.582	0.78	1.57		0.86	0.709	0.39	1.91
Nicotine abuse	Yes (Ref. No)	1.30	0.001	1.11	1.52		1.22	0.205	0.90	1.67		1.24	0.464	0.69	2.23
Rheumatism	Yes (Ref. No)	0.97	0.518	0.88	1.06		0.93	0.482	0.77	1.13		0.80	0.223	0.56	1.14
Diabetes mellitus	Yes (Ref. No)	1.08	0.005	1.02	1.14		1.09	0.103	0.98	1.20		1.17	0.080	0.98	1.40
Care need level	0 (Ref.)	1.00					1.00					1.00
	1	1.48	< 0.001	1.36	1.60		1.73	< 0.001	1.48	2.02		1.69	< 0.001	1.30	2.20
	2	1.84	< 0.001	1.68	2.01		2.14	< 0.001	1.82	2.52		1.67	< 0.001	1.27	2.21
	3	2.48	< 0.001	2.17	2.84		2.83	< 0.001	2.29	3.48		1.27	0.257	0.84	1.91
Nursing home	Yes (Ref. No)	1.04	0.308	0.96	1.12		0.93	0.229	0.83	1.05		0.81	0.058	0.66	1.01
Discharge diagnosis	S72.0 (Ref.)	1.00					1.00					1.00
	S72.1	1.03	0.353	0.97	1.09		1.06	0.286	0.95	1.17		1.04	0.645	0.87	1.25
	M16	0.46	< 0.001	0.42	0.50		0.14	< 0.001	0.11	0.18		0.13	< 0.001	0.08	0.22
Date of week, surgery	Sunday	0.88	0.024	0.79	0.98		0.84	0.089	0.69	1.03		0.82	0.286	0.58	1.18
	Monday (Ref.)	1.00					1.00					1.00
	Tuesday	1.03	0.566	0.94	1.12		1.01	0.885	0.85	1.21		1.06	0.707	0.78	1.45
	Wednesday	0.97	0.520	0.89	1.06		0.97	0.751	0.81	1.16		1.09	0.567	0.80	1.49
	Thursday	0.93	0.138	0.85	1.02		0.91	0.293	0.75	1.09		0.95	0.762	0.69	1.32
	Friday	1.00	0.916	0.92	1.10		1.01	0.951	0.84	1.20		0.90	0.505	0.65	1.23
	Saturday	0.90	0.062	0.81	1.01		0.89	0.263	0.73	1.09		0.91	0.576	0.64	1.28
Number of patients		10,310					10,310					10,310
Number of deaths		6130					1610					513

HR: Hazard ratio, UCI: upper confidence interval, LCI: lower confidence interval, Ref.: Reference group, MI: myocardial infection, COPD: chronic obstructive pulmonary disease, S72.0: femoral neck fracture, S72.1: pertrochanteric fracture, M16: coxarthrosis