Table 3.

Twin correlations

SES strata	The Netherlands		The United Kingdom
	MZ	DZ	MZ	DZ
SES low	0.87 [0.84, 0.89]	0.55 [0.49, 0.60]	0.83 [0.76, 0.88]	0.53 [0.43, 0.62]
SES medium	0.85 [0.83, 0.87]	0.53 [0.49, 0.57]	0.79 [0.75, 0.82]	0.49 [0.43, 0.54]
SES high	0.76 [0.73, 0.79]	0.41 [0.36, 0.46]	0.70 [0.64, 0.76]	0.41 [0.34, 0.48]