Table 1.

Characters of study subjects.

	2016		2018
	Mean or %	SD	Mean or %	SD
Age	69.36	7.54	68.23	6.36
Female	51.90		49.74
Education
Low	76.03		70.56
Middle	21.79		27.09
High	2.18		2.35
Health status
Very healthy	15.24		17.08
Relatively healthy	29.8		35.82
Generally healthy	23.29		17.10
Unhealthy	31.67		30.00
Life satisfaction	3.85	1.06	4.24	0.93
Depression level	−0.26	4.67	−0.15	4.54
Use of Internet	0.06		0.12
N	5031		5031