Table 3.

Significance of multivariate regression analysis variables on number of symptoms per day

Variables	√Arch ing/Irritability per day	√Coughs per day	√Emesis per day	√Sneezes per day
PMA at evaluation	<0.001**	<0.001**	0.95	0.88
Feeding Method at evaluation	0.61	<0.001**	0.70	0.66
Breathing Method at evaluation	<0.01*	<0.01*	0.09	0.01*
Gerd Phenotypes	0.06	0.06	<0.001**	0.23
Neuropathology	0.45	0.73	0.20	0.21
BPD	0.05	0.66	0.69	0.18
Overall Model Significance	<0.001**	<0.001**	<0.001**	<0.001**
Adjusted R-square	0.14	0.18	0.09	0.08

^*p<0.05,

^**p<0.001 on outcome. Table presents significance of explanatory power of variables on the square root transformation of number of symptoms per day from partial F-tests, overall model significance and their adjusted R squares.