Table 3.

Results of multiple linear regression with EQ-VAS score used as dependent variable (FU wave 9)

Independent variables	EQ-VAS (with function as independent variable)	EQ-VAS (without function as independent variable)
Being a current driver (ref.: not being a current driver)	3.62	5.00*
	(2.47)	(2.45)
Potential confounders	✔	✔
Constant	70.57**	90.49***
	(26.40)	(25.25)
Observations	535	535
R2	0.09	0.08

Beta coefficients were reported; Cluster-robust standard errors in parentheses

Potential confounders include: age, marital status, education, social network, function (only in the first model), and cognitive impairment

To quantify the level of education, the CASMIN classification was used. Lubben Social Network Scale ranges from 0 to 30, with higher values reflecting more social networks and more social support; Instrumental Activities of Daily Living Scale was used to quantify function, ranging from 0 (worst score) to 8 (best score); Global Deterioration Scale was used to quantify cognitive impairment, ranging from 1 (best score) to 7 (worst score)

***p < 0.001, **p < 0.01, *p < 0.05, ⁺p < 0.10