Table 3.

Twin correlations for the singing factor score by zygosity (n = 517 twin pairs)

Zygosity group	N pairs (%a)	Twin correlation [95% CI]
MZ male	98 (26%)	0.75 [0.65, 0.83]
MZ female	279 (74%)	0.78 [0.73, 0.83]
DZ male	30 (23%)	0.50 [0.18, 0.72]
DZ female	99 (77%)	0.60 [0.46, 0.71]
DZ opposite sex	11	0.43 [-0.15, 0.79]

MZ, monozygotic; DZ, dizygotic.

^a% for same sex zygotic twin pairs.