Table 1.

Demographic characteristics of the participants.

Variable	Number
Age
65–74	7
≥75	8
Gender
Men	7
Women	8
Pre-retirement occupation
Teacher	1
Worker	8
Civil servant	3
Engineer	1
Unemployed	2
Education
Primary school	6
Junior high	4
Senior high	2
College and above	3
Number of children
0	1
1	5
2	6
3	3
Monthly income (CNY)
0–2999	2
3000–3999	10
≥4000	3
Time living alone (year)
<1	2
1–5	8
≥6	5