Risk factors of health care–associated infection in elderly patients: a retrospective cohort study performed at a tertiary hospital in China

Zhao, Xia; Wang, Lihong; Wei, Nan; Zhang, Jingli; Ma, Wenhui; Zhao, Huijie; Han, Xu

doi:10.1186/s12877-019-1208-x

Table 2 Age, sex, operations, ICU admission, using devices and chronic diseases of the subjects with and without HAI in univariate analysis, category variables, aged 60+, in Beijing, China (As a retrospetive study, there were some missing values about chronic diseases)

From: Risk factors of health care–associated infection in elderly patients: a retrospective cohort study performed at a tertiary hospital in China

Variables		No. of subjects	No. of HAIs	Incidence (%)	χ ²	P
Age	60~69y	32156	637	1.98	241.76	< 0.001
	70~79y	18203	462	2.54
	≥80y	9973	481	4.82
Sex	Male	33280	909	2.73	3.69	0.06
Sex	Female	27052	671	2.48	3.69	0.06
Operation	No	32627	947	2.90	22.42	< 0.001
Operation	Yes	27705	633	2.28	22.42	< 0.001
ICU days	d = 0	51980	911	1.75	3625.18	< 0.001
	d < 2	1742	46	2.64
	2 ≤ d < 7	4120	159	3.86
	7 ≤ d < 14	1472	154	10.46
	d ≥ 14	1018	310	30.45
Using ventilator	No	58478	1191	2.04	2529.06	< 0.001
Using ventilator	Yes	1854	389	2.10	2529.06	< 0.001
Using central line catheter	No	56338	1015	1.80	2228.59	< 0.001
Using central line catheter	Yes	3994	565	14.15	2228.59	< 0.001
Using urinary catheter	No	43956	626	1.42	906.33	< 0.001
Using urinary catheter	Yes	16376	954	5.82	906.33	< 0.001
Cerebral hemorrhage	No	56866	1359	2.39	122.02	< 0.001
Cerebral hemorrhage	Yes	2770	160	5.78	122.02	< 0.001
Cerebral infarction	No	39857	871	2.19	63.38	< 0.001
Cerebral infarction	Yes	19779	648	3.28	63.38	< 0.001
Brain neoplasms	No	59192	1496	2.53	12.49	< 0.001
Brain neoplasms	Yes	444	23	5.18	12.49	< 0.001
Hypertension	No	25586	590	2.31	10.50	< 0.001
Hypertension	Yes	34050	929	2.73	10.50	< 0.001
Hyperlipidemia	No	51189	1330	2.60	3.84	0.05
Hyperlipidemia	Yes	8453	189	2.23	3.84	0.05
Diabetes mellitus	No	40751	985	2.42	8.76	< 0.001
Diabetes mellitus	Yes	18885	534	2.83	8.76	< 0.001
Coronary artery disease	No	41284	825	2.00	162.76	< 0.001
Coronary artery disease	Yes	18352	694	3.78	162.76	< 0.001
COPD	No	57510	1438	2.50	14.16	< 0.001
COPD	Yes	2126	81	3.81	14.16	< 0.001
Malignant tumor	No	49227	1203	2.44	12.13	< 0.001
Malignant tumor	Yes	10409	316	3.04	12.13	< 0.001
Malignant hematonosis	No	57123	1229	2.15	854.76	< 0.001
Malignant hematonosis	Yes	2513	290	11.53	854.76	< 0.001
Osteoarthropathy	No	56429	1435	2.54	0.07	0.79
Osteoarthropathy	Yes	3207	84	2.62	0.07	0.79
Gynecological diseases	No	58860	1510	2.56	6.10	0.020
Gynecological diseases	Yes	776	9	1.16	6.10	0.020

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