Table 2

Unadjusted correlation coefficients for birth weight in pairs of relatives as registered in the Norwegian Birth Registry 1967–98

Relationship Correlation 95% CI Number of pairs
Father-mother0.0200.016, 0.02867 795
Father-child0.1290.122, 0.13667 795
Father-son0.1260.116, 0.13635 048
Father-daughter0.1330.122, 0.14432 747
Mother-child0.2260.219, 0.23167 795
Mother-son0.2220.212, 0.23235 048
Mother-daughter0.2310.221, 0.24132 747