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Table 6 Correlation between birth weight (BW) and placental weight (PW) according to the joint ACP1-ADA1 phenotype.

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

  Joint ACP1-ADA1 phenotype
Presence of ADA*2 allele - - + +
Presence of A or CA or CB types - + - +
BW-PW correlation coefficients (r) 0.193 0.613 0.648
Significance of r (p) 0.004 0.000 0.059
Total n° 217 101 9
  1. Significance of difference among correlation coefficients p = 0.000. Significance of difference among correlation coefficients has been calculated according to Snedecor and Cochran