Table 2.

Basic descriptive statistics

Varname	Mean			Mean-Diff	T value
	Total (N = 4645)	Not using the Internet (N = 4312)	Using the Internet (N = 333)
CES-D score	19.268	19.548	15.637	3.912***	10.013
Gender	0.223	0.215	0.318	−0.103***	−4.354
Age	68.168	68.333	66.024	2.309***	6.607
Education level	1.374	1.294	2.408	−1.114***	−27.448
Marital status	0.785	0.780	0.841	−0.060***	−2.588
Smoking status	0.072	0.068	0.123	−0.055***	−3.781
Drinking status	0.205	0.192	0.366	−0.174***	−7.632
Residence	0.315	0.278	0.790	−0.511***	−20.188
Religious belief	0.131	0.133	0.108	0.025	1.279
Political status	0.085	0.068	0.297	−0.229***	−14.776
Air quality status	3.192	3.216	2.883	0.333***	7.143
Medical insurance	0.974	0.972	0.994	−0.022**	−2.400
Social capital	0.052	−0.013	0.904	−0.918***	−15.933

Note: ^* p < 0.10, ^** p < 0.05, ^*** p < 0.01