Birth weight in a large series of triplets

BMC Pediatrics

Table 6 Parameter estimates for triplet BW and causal agents influencing BW, based on model 5d

	Mean/variance/covariance (grams)
	MZ	DZ/TZ _{(fb, sb, tb)}
Mean	2765	2915/2826, 2811, 2710
Variance	111	104
covariance	46	33
correlation	0.42 (0.29 - 0.54)	0.32 (0.25 - 0.38)
covariate	range	Effect in grams
GA	-16 to 0: weight gain per week	130
Sex	0/1: Boy/girl	-110
Smoking	0/1: No/yes	-104

GA = gestational age, fb = first born, sb = second born, tb = third born. Results given for MZ triplets include triplets from both the MZ group and the DZ group.

ISSN: 1471-2431