Objective: To observe the duration for normalization of the Total Leucocyte Count (TLC) with adjuvant Granulocyte-Colony Stimulating Factor (G-CSF) treatment in leukopenic neonatal sepsis, and to compare the neutrophilic response to G-CSF in neutropenic vs non-neutropenic subgroups.
Methods: This prospective cohort study was carried out at the Neonatal Intensive Care Unit at Military Hospital Rawalpindi (NICU) from 1st August 2015 to 25th January 2017. Fifty one newborns with sepsis and leucopenia were sampled judgmentally from a population of 5666 admitted to NICU during the study period. The sample was then divided into neutropenic (exposed) and non-neutropenic (non-exposed) subgroups on basis of the absolute neutrophil count (ANC). Adjuvant G-CSF was given to all subjects and stopped once TLC normalized. SPSS v22 was used to calculate mean G-CSF treatment duration and rise in ANC. A Pearson correlation coefficient and simple linear regression were computed to assess the relationship between pre-GCSF ANC and the duration of treatment with GCSF. Comparison of subgroups with respect to rise in ANC was done using independent samples T-test.
Results: The mean duration of G-CSF treatment was 1.82±0.81 days (1.0 - 4.0). Neutropenic neonates constituted 49% (n=25). The Pearson correlation coefficient showed a positive but negligible and non-significant correlation between the two variables, r = 0.070, n = 51, p = 0.625. A non-significant regression equation was found (F(1,49) = 0.242,p=0.625) with an R2 of 0.005. There was a 7.06±4.5 fold rise in ANC in the neutropenic subgroup compared to the 4.5±3.1 fold rise in the non-neutropenic subgroup (p=0.04).
Conclusions: The mean duration for recovery from leukopenia with G-CSF treatment in neonatal sepsis was less than 2 days and had no significant relationship with pre-GCSF absolute neutrophil count. The neutrophilic response was significantly higher in neutropenic compared to non-neutropenic neonates. As GCSF made no difference to the outcome in terms of mortality, its routine use is not recommended in leukopenic neonatal sepsis. .
Keywords: Neonatal sepsis, neutropenia, Granulocyte Colony-Stimulating Factor..