. 2023 Nov 22;11:1303541. doi: 10.3389/fpubh.2023.1303541

Table 4.

Robustness test 1.

Variable	Order probit	Order logit	Tobit
	(1)	(2)	(3)
dig	0.4567^***	0.7800^***	0.4673^***
	(0.0611)	(0.1017)	(0.0646)
age	0.0424^***	0.0710^***	0.0450^***
	(0.0033)	(0.0057)	(0.0035)
age_2	−0.0002^***	−0.0004^***	−0.0002^***
	(0.0000)	(0.0001)	(0.0000)
gender	−0.1583^***	−0.2731^***	−0.1640^***
	(0.0190)	(0.0324)	(0.0199)
eduyear	−0.0012	−0.0056	−0.0026
	(0.0021)	(0.0037)	(0.0022)
marriage	−0.0006	0.0028	−0.0129
	(0.0297)	(0.0496)	(0.0310)
smoke	−0.0288	−0.0517	−0.0324
	(0.0211)	(0.0363)	(0.0222)
drink	−0.1546^***	−0.2624^***	−0.1671^***
	(0.0248)	(0.0433)	(0.0262)
familysize	−0.0302^***	−0.0513^***	−0.0316^***
	(0.0046)	(0.0079)	(0.0048)
lnfincomeper	−0.0435^***	−0.0752^***	−0.0477^***
	(0.0099)	(0.0172)	(0.0104)
lngdp	−0.1514^***	−0.2458^***	−0.1530^***
	(0.0299)	(0.0510)	(0.0315)
lnmediexp	0.2106^***	0.3739^***	0.2108^***
	(0.0428)	(0.0731)	(0.0450)
N	20,101	20,101	20,101
R²	0.0414	0.0429	0.0385