. 2022 Sep 1;19(17):10923. doi: 10.3390/ijerph191710923

Table 4.

Interaction effects of providing eyeglasses on the wearing of eyeglasses between provinces.

Dep. Var.: Endline Eyeglasses Wearing	(1)	(2)	(3)	(4)
	Unadjusted	Adjusted	Unadjusted	Adjusted
Treatment (1 = yes)	0.146 ***	0.140 ***	0.140 ***	0.132 ***
Treatment (1 = yes)	(0.025)	(0.025)	(0.028)	(0.030)
Baseline eyeglass wearing (1 = yes)	0.336 ***	0.266 ***	0.336 ***	0.266 ***
Baseline eyeglass wearing (1 = yes)	(0.028)	(0.034)	(0.028)	(0.034)
Province (1 = Gansu)	−0.066	−0.045	−0.073	−0.054
Province (1 = Gansu)	(0.113)	(0.114)	(0.114)	(0.117)
Treatment × Province (1 = Gansu)			0.012	0.017
Treatment × Province (1 = Gansu)			(0.056)	(0.051)
Treatment effect for Gansu endline eyeglass wearing			0.159 ***	0.151 ***
Treatment effect for Gansu endline eyeglass wearing			(0.049)	(0.042)
Treatment effect for Shaanxi endline eyeglass wearing			0.138 ***	0.132 ***
Treatment effect for Shaanxi endline eyeglass wearing			(0.028)	(0.030)
Baseline standardized math score controlled	Yes	Yes	Yes	Yes
Student, family, teacher, characteristics controlled	-	Yes	-	Yes
Number of observations	2087	2087	2087	2087
R-square	0.213	0.252	0.213	0.252

Notes: Full sample is analyzed. Standardized coefficients are reported. Standard errors clustered at the school level are reported in parentheses. *** p < 0.01.