Table 2: Distribution of perinatal risk factors for atopic dermatitis in 907 twin pairs, 3–9 years of age, discordant for atopic dermatitis.

All twin pairs ( )MZ twin pairs ( )DZ twin pairs ( )
Affected twinsUnaffected twinsAffected twinsUnaffected twinsAffected twinsUnaffected twins

Birth weight, g262726492624262526322650
Birth length, cm48.3748.4148.6048.1748.4048.44
Apgar score9.819.689.809.759.809.67
Female sex52.347.453.453.453.147.8