Effect of informal care on health care utilisation for the elderly in urban and rural China: evidence from China health and retirement longitudinal study (CHARLS)

Table 4 Association between informal care and health service utilisation in urban and rural China: fixed-effect negative binomial model for panel data

	Urban (N = 1427)		Rural (N = 4277)
	IRR (Inpatient)	IRR (Outpatient)	IRR (Inpatient)	IRR (Outpatient)
Informal care(reference: None)
1-14d	0.488	3.164^a	1.210	1.330
15-29d	2.038	2.015	2.114^b	1.227
30d or more	1.208	1.804	1.532^c	1.500^b

Note: IRR incidence rate ratio. All models have controlled variables, including gender, age, marital status, education, chronic diseases, smoke, drink, medical insurance, number of ADL limitations, number of IADL limitations, financial support, pension and self-rated health. (^a), (^b), (^c) mean significant level at 10%, 5%, 1%, respectively

ISSN: 1472-6963