Table 5. The adjusted regression coefficients and 95% confidence interval (CI) of demographic characteristics in predicting the overall scores of quality of life of elderly people in multiple linear regression.

Demographic characteristics	Coefficients (95%CI)	P-Value €
Constant	31.1 (24.2, 37.8)	0.001*
Male vs. Female	9.7 (7.2, 12.1)	0.001*
Age group
70-79 vs. 60-69 years	-8.7 (-11.6, -5.8)	0.001*
≥80 vs. 60-69	-15.4 (-19.4, -11.4)	0.001*
Educational level
≥high school vs.<high school	6.6 (3.7, 9.5)	0.001*
Marital status
Couple vs. not	3.7 (0.5, 6.9)	0.02*

^€ T-test; ^*statistically significant