Comparison of Fenton, INTERGROWTH-21st, and Population-Based Growth Charts in Predicting Outcomes of Very Preterm Small-for-Gestational-Age Neonates

Growth chart aids in management by identifying at-risk neonates with abnormal growth. In this retrospective analysis of 1067 neonates of 26-31 wk gestational age, the utility of 3 growth charts (local population-based, Fenton-2013, and INTERGROWTH-21(st)) was studied in identifying very preterm neonates at risk of developing complications secondary to intrauterine growth retardation (hypoglycemia, mortality, and BPD at 36 wk). The proportion of neonates classified as small for gestational age was 9% (n = 96) with Fernandez chart, 16.7% (n = 178) with Fenton-2013 chart, and 24.8% (n = 265) with INTERGROWTH-21(st) charts. The INTERGROWTH-21(st) charts were more sensitive in identifying neonates developing complications, followed by Fenton-2013 and population-based charts. The population-based charts were more specific, accurate, and precise in differentiating neonates developing complications from those who did not, followed by Fenton-2013 and INTERGROWTH-21(st) charts. For the outcomes studied, INTERGROWTH-21(st) charts had reasonable tradeoff between sensitivity and (34%-50%) and specificity (76%-77%).