Table 2.

Fixed effect modeling of changes in SRH and the annual family income per capita between 2010, 2014, and 2018.

	Model 1: Whole sample		Model 2: illiteracy		Model 3: non-illiteracy
	β	95% CI	β	95% CI	β	95% CI
Ln (The annual family income per capita)	0.0338	−0.0182 0.0858	0.0770**	0.0065 0.1473	−0.0252	−0.1018 0.0514
Age	0.0132	−0.0957 0.1220	0.0210	−0.0919 0.1338	−0.1099	−1.0305 0.8107
Marital status	−0.2139	−0.5313 0.1035	−0.0189	−0.4267 0.3889	−0.4830	−0.9976 0.0223
Chronic disease	−0.3433**	−0.4782 −0.2082	−0.4844***	−0.6712 −0.2976	−0.1711*	−0.3643 0.0222
Intercept	1.5333	−6.4315 9.4982	0.5044	−7.7907 8.7996	11.1732	−55.8225 78.1689
R2: within	0.4110		0.3837		0.4614

Regression coefficients are unstandardized and unweighted;

^*** P < 0.01;

^**P < 0.05.