Table 2

Variables of equation 1, estimating the probability for an infant of needing treatment for IHPS

 β coefficient SE p value β0, constant +0.88374 0.65640 X, sex; male = 0, female = 1 −1.37912 0.05421 <0.0001 Y, days after 31 Dec 1986 −0.00013 0.00002 <0.0001 Z, latitude, degrees −0.11022 0.01119 <0.0001
• The value of a β coefficient indicates the degree and direction of the effect of its variable in the function.