Table 1. Person-years of follow-up, number of outcome events, and incidence per 1,000 person years of observation by residence, sex, and age groups among Chinese late-elderly, 1998–2018.

Groups	All participants			Longevity			Healthy longevity			Usual longevity
	No. of participants	Person-years		No. of events	Incidence		No. of events	Incidence		No. of events	Incidence
Total	11,005	43,154		3,454	80.0		735	17.0		2,719	63.0
Residence
Urban	4,683	17,980		1,371	76.3		311	17.3		1,060	59.0
Rural	6,322	25,174		2,083	82.7		424	16.8		1,659	65.9
Sex
Men	5,595	21,103		1,572	74.5		417	19.8		1,155	54.7
Women	5,410	22,051		1,882	85.3		318	14.4		1,564	70.9
Age group (years)
75–79	1,516	9,339		179	19.2		40	4.3		139	14.9
80–84	4,791	20,952		938	44.8		185	8.8		753	36.0
85–89	4,698	12,862		2,337	181.7		510	39.7		1,827	142.0