Table 3. Association of parental education and health indicators with school level assessment (Z-score) (n = 1,865) ^a .

	Crude b	Adjusted for maternal education	Adjusted for paternal education	Adjusted for maternal education and all health indicators	Adjusted for paternal education and all health indicators
	βc (95% CI) c	βc (95% CI) c	βc (95% CI) c	βc (95% CI) c	βc (95% CI) c
Parental education
Maternal education
High (reference)	0			0
Intermediate	-0.41 (-0.50;-0.32)			-0.41 (-0.50;-0.32)
Low	-0.92 (-1.05;-0.80)			-0.90 (-1.03;-0.77)
Paternal education
High (reference)	0				0
Intermediate	-0.46 (-0.55;-0.36)				-0.45 (-0.54;-0.35)
Low	-0.92 (-1.04;-0.80)				-0.91 (-1.03;-0.79)
Health indicators
Eczema (no. of years)	-0.00 (-0.02;0.02)	-0.01 (-0.02;0.01)	-0.00 (-0.02;0.02)	-0.00 (-0.02;0.02)	0.00 (-0.02;0.02)
Asthma symptoms (no. of years)	-0.02 (-0.05;0.01)	-0.01 (-0.04;0.01)	-0.02 (-0.04;0.01)	-0.00 (-0.03;0.02)	-0.01 (-0.04;0.025)
Poor general health (no. of years)	-0.04 (-0.07;0.00)	-0.03 (-0.07;0.01)	-0.03 (-0.06;0.01)	-0.02 (-0.06;0.02)	-0.01 (-0.05;0.03)
Freq. respiratory infections (no. of years)	-0.03 (-0.07;0.01)	-0.01 (-0.05;0.02)	-0.02 (-0.06;0.02)	0.00 (-0.04;0.04)	-0.00 (-0.04;0.04)
Overweight (no. of years)	-0.05 (-0.08;-0.01)	-0.03 (-0.06;0.00)	-0.02 (-0.05;0.01)	-0.03 (-0.06;0.00)	-0.02 (-0.05;0.01)
School absence
0 days (reference)	0	0	0	0	0
1–2 days	0.07 (-0.04;0.19)	0.01 (-0.10;0.12)	0.04 (-0.06;0.15)	0.02 (-0.09;0.13)	0.04 (-0.06;0.15)
3–5 days	0.03 (-0.09;0.14)	-0.00 (-0.12;0.11)	-0.00 (-0.11;0.11)	0.01 (-0.11;0.12)	-0.00 (-0.11;0.12)
>5 days	-0.18 (-0.33;-0.03)	-0.12 (-0.26;0.02)	-0.17 (-0.31;-0.03)	-0.10 (-0.24;0.05)	-0.15 (-0.29;-0.00)

^a Adjusted for the sex of the child

^b crude models, only adjusted for sex of the child

^c 95% confidence intervals of β.