. 2021 Dec 7;12:739085. doi: 10.3389/fpsyt.2021.739085

Table 3.

Impact of internet use frequency and the kind of internet usage using OLS.

	(1)	(2)	(3)	(4)	(5)	(6)
Frequency	−0.0573^**	−0.0134
	(0.0293)	(0.9479)
Learn		−0.0134
		(0.9479)
Work			−0.1094
			(0.7938)
Social contact				−0.2586^*
				(0.0974)
Entertainment					−0.4106^***
					(0.0080)
Commercial activity						−0.0532
						(0.8274)
Age	−0.0122	−0.0099	−0.0104	−0.0115	−0.0125	−0.0104
	(0.1573)	(0.2451)	(0.2235)	(0.1824)	(0.1455)	(0.2229)
Gender	−1.1251^***	−1.1282^***	−1.1248^***	−1.1301^***	−1.1239^***	−1.1255^***
	(0.0000)	(0.0000)	(0.0000)	(0.0000)	(0.0000)	(0.0000)
Education	−0.3966^***	−0.4253^***	−0.4243^***	−0.4043^***	−0.3953^***	−0.4237^***
	(0.0003)	(0.0001)	(0.0001)	(0.0002)	(0.0003)	(0.0001)
Hukou	−0.2314	−0.2669^*	−0.2679^*	−0.2432^*	−0.2244	−0.2664^*
	(0.1092)	(0.0638)	(0.0618)	(0.0923)	(0.1205)	(0.0638)
Marriage	−1.6669^***	−1.6644^***	−1.6690^***	−1.6654^***	−1.6678^***	−1.6690^***
	(0.0000)	(0.0000)	(0.0000)	(0.0000)	(0.0000)	(0.0000)
Residence	−0.4867^***	−0.4972^***	−0.4964^***	−0.4912^***	−0.4851^***	−0.4958^***
	(0.0000)	(0.0000)	(0.0000)	(0.0000)	(0.0001)	(0.0000)
lnfinc	0.1711	0.1945	0.1935	0.1781	0.1709	0.1935
	(0.4802)	(0.4203)	(0.4221)	(0.4618)	(0.4806)	(0.4225)
(lnfinc)²	−0.0426^***	−0.0445^***	−0.0444^***	−0.0432^***	−0.0425^***	−0.0444^***
	(0.0019)	(0.0011)	(0.0011)	(0.0016)	(0.0019)	(0.0011)
_cons	20.4054^***	20.1238^***	20.1503^***	20.3096^***	20.4425^***	20.1623^***
	(0.0000)	(0.0000)	(0.0000)	(0.0000)	(0.0000)	(0.0000)
Province dummies	Yes	Yes	Yes	Yes	Yes	Yes
N	7,617	7,617	7,616	7,617	7,616	7,616
r2_a	0.1304	0.1300	0.1297	0.1302	0.1305	0.1297

^{***, **, and *}

indicate significance at 1, 5, and 10%, respectively. Standard errors are presented in parentheses.