Table 1.

Variable description and descriptive statistics.

Variable	Name	Description	Mean	SD
Health	Health	Score ranges: 1–5. The larger score, the healthier	3.015	1.183
IUGV	First class	Light-life users, N = 1061, C1	0.10	0.294
	Second class	All-around users, N = 1980, C2	0.18	0.383
	Third class	Functional users, N = 1239, C3	0.11	0.315
	Fourth class	Pure-life users, N = 6806, C4	0.61	0.487
IIDV	INT infomation	Importance of the Internet for you to obtain information Value ranges: 1–5	3.185	1.6154
ICV	Gender	Gender: Male = 1, Female = 0	0.50	0.500
	Age	Age: actual age. Value ranges: 16–96	45.12	14.869
	Marriage	marital status: with spouse = 1, without spouse = 0	0.81	0.396
	Education	Years of education, from illiterate to doctorate. Value ranges: 0–22	8.33	4.732
	Chronic	chronic disease: Do you have the chronic disease? Yes = 1, No = 0	0.14	0.345
SCV	Employ	Working status: employed = 1, unemployed = 0	0.82	0.383
	Family number	Family size: number of family members. Value ranges: 1–17	4.09	1.997
	Income	Income: logarithm of per capita household income (annual income/family size)	9.490	0.998
LHV	Exercise	Exercise: the frequency of physical exercise in the last week. Value ranges: 0–50	2.55	3.271
	Smoke	Smoking: Smoking in the past month? Yes = 1, No = 0	0.68	0.465
	Drink	Drinking: 3 times per week in the past month? Yes = 1, No = 0	0.84	0.368

IUGV, Internet use gap variable; IIDV, Internet information dependence variable; ICV, Individual characteristic variables; SCV, Social characteristic variables; LHV, Living habits variables; same below.