[Predictive value of hemoglobin decrease for necrotizing enterocolitis in preterm infants with late-onset sepsis].

OBJECTIVES: To study the predictive value of hemoglobin (Hb) decrease for the occurrence of necrotizing enterocolitis (NEC) in preterm infants with late-onset sepsis (LOS) .

METHODS: Clinical data of 93 LOS preterm infants were collected for retrospective analysis, among which 16 infants developed NEC while 77 infants did not. Based on the decrease in Hb levels from the most recent Hb measurement before LOS occurrence to the initial Hb levels during LOS, the infants were divided into three groups: no Hb decrease ( n =15), mild Hb decrease (Hb decrease <15 g/L; n =35), and severe Hb decrease (Hb decrease ≥15 g/L; n =43). Multivariate logistic regression analysis was conducted to explore the predictive factors for NEC secondary to LOS, and the value of Hb decrease in predicting NEC secondary to LOS was evaluated through receiver operating characteristic curve analysis.

RESULTS: The incidence of NEC in the severe Hb decrease group, mild Hb decrease group, and no Hb decrease group were 26%, 14%, and 0% ( P <0.05), respectively. Multivariate logistic regression analysis revealed that a larger Hb decrease was an independent predictive factor for NEC in LOS preterm infants ( OR =1.141, 95% CI : 1.061-1.277, P <0.001). Receiver operating characteristic curve analysis showed that the area under the curve for predicting NEC in preterm infants with LOS using Hb decrease (with a cut-off value of 20 g/L) was 0.803, with sensitivity and specificity of 0.69 and 0.78, respectively.

CONCLUSIONS: Hb decrease can serve as an indicator for prediction of NEC in preterm infants with LOS.