Table 5.

Parameter estimates of the best fitting saturated model (model 3) with 95% confidence intervals

	The Netherlands		The United Kingdom
	Correlation		Correlation
	MZ	DZ	MZ	DZ
SES low	0.86 [0.83, 0.88]	0.54 [0.49, 0.59]	0.86 [0.83, 0.88]	0.54 [0.49, 0.59]
SES medium	0.83 [0.81, 0.85]	0.51 [0.48, 0.54]	0.83 [0.81, 0.85]	0.51 [0.48, 0.54]
SES high	0.74 [0.71, 0.77]	0.41 [0.37, 0.45]	0.74 [0.71, 0.77]	0.41 [0.37, 0.45]

		Mean	Variance	Mean	Variance
SES low	Boys	− 0.86 [− 0.93, − 0.79]	0.09 [0.03, 0.16]	− 0.67 [− 0.78, − 0.57]	0.01 [− 0.09, 0.11]
	Girls	− 0.64 [− 0.71, − 0.57]	0.35 [0.28, 0.41]	− 0.45 [− 0.55, − 0.35]	0.21 [0.11, 0.30]
SES medium	Boys	− 0.75 [− 0.80, − 0.71]	0.19 [0.15, 0.24]	− 0.49 [− 0.54, − 0.43]	0.27 [0.22, 0.32]
	Girls	− 0.55 [− 0.59, − 0.51]	0.49 [0.44, 0.53]	− 0.29 [− 0.35, 0.24]	0.48 [0.42, 0.53]
SES high	Boys	− 0.60 [− 0.64, − 0.55]	0.41 [0.37, 0.45]	− 0.26 [− 0.33, − 0.20]	0.48 [0.41, 0.54]
	Girls	− 0.37 [− 0.41, − 0.32]	0.69 [0.65, 0.74]	− 0.09 [− 0.16, − 0.03]	0.65 [0.58, 0.71]