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Table 4 Weight a and length b delta z-scores from birth to subsequent age points by stepwise multivariate regression analysisc

From: Antibiotic exposure and growth patterns in preterm, very low birth weight infants

  Delta Weight z-Scorea
  ~ 36 weeks ~ 2 months ~ 4 months ~ 6 months ~ 12 months
No. of infants 161 151 134 136 129
Length 0.359 0.476 0.562 0.599 0.606
Gestational age 0.346 0.242 0.272 0.316
IUGR 0.137 0.174 0.138 0.151 0.119
Total parenteral nutrition (total days) −0.349
Delivery mode 0.174
Late-onset sepsis −0.153
PDA 0.143
  Delta Length z-Scoreb
  ~ 36 weeks ~ 2 months ~ 4 months ~ 6 months ~ 12 months
Weight delta z-score 0.444 0.568 0.644 0.674 0.701
Late-onset sepsis 0.152
  1. aThe total days of parenteral nutrition showed a strong negative correlation with weight z-scores at 36 weeks’ postmenstrual age, while positive associations were seen with gestational age, length, and IUGR status. Antibiotic exposure was not significant at any time point. P-value was ≤0.05 for all displayed z-score values.
  2. bPositive associations were seen with the length delta z-score and late-onset sepsis (p < 0.05).
  3. cPearson correlation
  4. IUGR intrauterine growth restriction, PDA patent ductus arteriosus