The genetics of feto-placental development: A study of acid phosphatase locus 1 and adenosine deaminase polymorphisms in a consecutive series of newborn infants

Table 4 Parameters distribution of newborns in relation to ADA₁ phenotypes.

	ADA₁ phenotypes		Significance of difference between phenotypes (p)
	ADA₁1	(ADA₁2/1+ADA₁2)
Absolute frequencies	317	58
Percent frequencies	84.5%	15.5%
Birth weight (gr)
Mean	3279	3311	0.612*
S.E.	32	54
Placental weight (gr)
Mean	584	545	0.103*
S.E.	10	13
Gestational age (wks)
Mean	39.63	39.84	0.505*
S.E.	0.13	0.24
Median	40.00	40.00
Correlation between birth weight and placental weight (r)	0.289	0.552	0.040**
Significance of r (p)	0.000	0.000

Significance of difference between means (*) refers to Variance analysis. Significance of difference between correlation coefficients (**) has been calculated according to Snedecor and Cochran

ISSN: 1477-7827