Table 6.

Model specifications of multilevel analyses, including 95 % Confidence Intervals [CI] of fixed effects

	Empty model		Model 1		Model 2		Model 3		Model 4
	Estimate	S.E.	Estimate	S.E.	Estimate	S.E.	Estimate	S.E.	Estimate	S.E.
Intercept	34.61***	0.72	34.47***	1.40	33.47***	0.81	32.75***	1.24	33.00***	0.92
Disability			-1.69 [-4.60, 1.21]	1.46
Illness onset					-1.44 [-4.03, 1.13]	1.30
Illness course							0.46 [-2.12, 3.03]	1.29
Illness outcome									0.23 [-2.02, 2.47]	1.13
Parental depression			1.17 [-0.31, 2.65]	0.74	1.11 [-38, 2.61]	0.75	1.08 [-0.44, 2.59]	0.76	1.11 [-38, 2.61]	0.75
Quality of marital relationship			1.24 [-0.32, 2.80]	0.78	1.25 [-0.32, 2.82]	0.79	1.25 [-0.21, 2.83]	0.79	1.25 [-0.32, 2.82]	0.79
Quality of parent-child interaction			-1.38* [-2.62, -0.14]	0.62	-1.44* [-2.70, -0.19]	0.63	-1.48* [-2.76, -0.20]	0.64	-1.44 [-2.69, -0.19]	0.63
Quality of parent attachment			-3.97*** [-5.13, -2.80]	0.59	-3.97*** [-5.13, -2.79]	0.59	-3.96*** [-5.13, -2.79]	0.59	-3.97*** [-5.13, -2.79]	0.59
Adolescents’ gender			3.13** [1.27, 5.16]	1.03	3.06** [1.03, 5.11]	1.03	3.08** [1.51, 5.42]	1.03	3.06** [1.03, 5.11]	1.03
Adolescents’ age			0.94 [-0.12, 2.00]	0.54	0.93 [-0.13, 2.00]	0.54	0.95* [-0.12, 2.03]	0.54	0.93 [-0.13, 2.00]	0.54
Level 1 variance	46.07		34.94		34.73		34.84		34.92
Level 2 variance	19.86		6.35		6.62		6.86		6.78
AIC	1105.74		1021.50		1021.83		1022.97		1023.33
Explained variance (Level 1)			37.4 %		37.3 %		36.8 %		36.8 %
Explained variance (Level 2)			43.4 %		44.7 %		43.4 %		43.5 %

AIC Akaike Information Criterion. Explained variance at Level 2 was calculated assuming that families have two children on average.*p < 0.05. **p < 0.01. ***p < 0.001