Table 7

Multivariate risk of the (late) onset NEC after day 28 by BW group

Weight groups (g)NCases (exposed)RR*,†95% CIp Value
≤75062919 (10)0.0570.021 to 0.15<0.01
751–100071115 (8)0.170.058 to 0.49<0.01
1001–12507717 (6)4.320.49 to 370.19
1251–15008101 (0)
  • *Adjusted by gender, race and SGA.

  • †Extended Mantel-Haenszel for linear trend excluding last weight group, p=0.003.

  • BW, birth weight; NEC, necrotising enterocolitis; SGA, small for gestational age.