Table 4.

Relationships between the EQ-5D-Y index values and demographic factors

	Estimate	Standard error	p value
Intercept	0.961	0.026	< 0.001
Children’s age	0.000	0.000	0.629
Children’s sex	0.002	0.003	0.620
Household income (JPY1 million)	0.002	0.000	< 0.001
Parents’ marital status
Married	–	–	–
Others (unmarried, divorced)	0.032	0.020	0.113
Parents’ employment status
Both parents are working	–	–	–
One of the parents is working	0.010	0.015	0.478
Neither parent is working	− 0.008	0.015	0.211
Parents’ history of education (university or graduate)
Both parents	–	–	–
Either parent	0.005	0.005	0.257
Neither	0.006	0.004	0.817