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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: J Neonatal Nurs. 2008;14(1):9–16. doi: 10.1016/j.jnn.2007.11.001

1. Fixed Component.

Wald Test LR Test
Effect Estimate SE z χ2 p χ2 p
Intercept 10.17 22.68 .45 .20 .65 .20 .65
D1 -2.55 2.92 -.87 .76 .38 .75 .39
D2 -4.29 2.82 -1.52 2.32 .13 2.28 .13
BW .00 .00 .11 .01 .91 .01 .91
GA@BIRTH .21 .99 .22 .05 .83 .05 .83
PMA@test -.02 .60 -.03 .00 .98 .00 .98

Intercept = estimated NNS AMP mean for ‘Healthy Control’ group

Intercept + D1 = estimated NNS AMP mean for ‘RDS1’ group

Intercept + D2 = estimated NNS AMP mean for ‘RDS2’ group