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Table 2 Results of GEE models of Proteobacteria relative abundance for weeks 1 and 2 sample within each hospital NICU

From: Intestinal microbiota of preterm infants differ over time and between hospitals

Predictor variable

Hospital 1

Hospital 2

Coefficient

p value

Coefficient

p value

Linear models

Year 2011 vs. 2010

0.313

0.003

-0.241

0.020

 Maternal antibiotic use

  

0.236

0.063

 Infant gestational age

  

-0.0863

0.0082

Logistic modelsa

Year 2011 vs. 2010

1.63

0.033

-2.77

0.039

 Maternal age at delivery

  

0.0853

0.28

 Infant gestational age

  

-0.999

0.11

  1. aLogistic models compare odds of high Proteobacteria (relative abundance ≥25%) vs. low Proteobacteria.