Table 3.

Twin correlations (95% confidence intervals) for study variables by zygosity

	MZm	MZf	DZm/MMsibs	DZf/FFsibs	DZo/OSsibs
Panic/agoraphobia	.53 (.35, .67)	.32 (.15, .47)	.12 (−.10, .31)	.18 (.03, .32)	.03 (−.10, .16)
Social Anxiety	.43 (.24, .59)	.34 (.17, .48)	.37 (.18, .54)	.24 (.09, .38)	.09 (−.04, .21)
Physical Injury Fears	.21 (.01, .41)	.41 (.25, .54)	.15 (−.05, .34)	.17 (.02, .31)	.07 (−.06, .19)
Obsessive‐compulsive Symptoms	.36 (.16, .53)	.45 (.30, .58)	.21 (−.01, .41)	.08 (−.08, .23)	.16 (.04, .28)
Generalised Anxiety Symptoms	.41 (.21, .57)	.48 (.33, .60)	.11 (−.11, .31)	.24 (.08, .39)	.10 (−.03, .23)
Attention Problems	.39 (.16, .60)	.44 (.28, .57)	.14 (−.08, .34)	.22 (.06, .36)	.26 (.13, .38)

MZm, monozygotic male; MZf, monozygotic female; DZm/MMsibs, dizygotic male and male siblings; DZf/FFsibs, dizygotic female and female siblings; DZo/OSsibs, dizygotic opposite‐sex and opposite‐sex siblings.