Low and high birth weight in a hospital population in Sudan: An analysis of clinical cut-off values.

Objective: To determine the cut-off values for low birth weight (LBW) and high birth weight (HBW) of Sudanese newborns.

Methods: Data (maternal age, parity, birth weight, and gender of the newborn) from women (n = 2818) who delivered at Saad Abualila Hospital in Khartoum were retrieved from the medical files.

Results: The cut-off for LBW (the 10th centile) was 2400 g and the 90th centile (HBW) was 3700 g. Out of 2818 newborns, 317 (11.2%) had birth weights below 2400 g. Using the WHO (traditional) cut-off of 2500 g, the prevalence of LBW was 14.3%. The difference between the two prevalences of LBW was statistically significant (P < 0.001). However, the agreement rate between the two was high (κ = 0.86). The cut-off to define HBW was 3700 g. In the study, 292 (10.4%) newborns had birth weights of at least 3700 g. Using the cut-off of 4000 g, the prevalence of HBW was 9.5%. The difference between the two prevalences of HBW was statistically significant (P < 0.001). However, the agreement rate between the two was low (κ = 0.06).

Conclusion: The cut-off values for low and high birth weight were 2400 and 3700 g, respectively.