Table 5.

Results of multiple linear regression (with explanatory variable) by age.

Variables	Model 15		Model 16		Model 17
	60–69 Years Old		70–79 Years Old		80 Years Old and Above
	Coefficient	Standard Deviation	Coefficient	Standard Deviation	Coefficient	Standard Deviation
Family socioeconomic status	−0.086 ***	0.018	−0.094 ***	0.014	−0.009	0.014
Constant	0.046	0.115	−0.124 **	0.058	−0.423 ***	0.028
n	976		1977		4646
F Value	10.910 ***		12.880 ***		144.100 ***
R2	0.116		0.080		0.220

** p < 0.05, *** p < 0.01. The control variables in each model have been controlled.