Detection of Fetal Malnutrition: Clinical Assessment of Nutritional Status Score Compared with Weight for Gestation and Ponderal Index

Introduction: Fetal malnutrition represents a distinct clinical entity that is not synonymous with small for gestational age or intrauterine growth retardation, as these conditions may occur independently of one another. The Clinical Assessment of Nutritional Status score provides a systematic method for evaluating fetal malnutrition and offers advantages over conventional anthropometric measures used to assess fetal growth. Methods: This prospective cross-sectional study examined 100 full-term neonates at a tertiary care hospital over three months. Neonates were categorized as small for gestational age or appropriate for gestational age using Alexander growth curves. Fetal malnutrition was evaluated using the Clinical Assessment of Nutritional Status score as the reference standard and compared with weight for gestational age and Ponderal index measurements. A Clinical Assessment of Nutritional Status score of 24 or below was designated as indicating fetal malnutrition. Results: The Clinical Assessment of Nutritional Status score identified malnutrition in 16% of neonates while classifying 84% as well-nourished. Assessment based on weight for gestational age revealed that 63% of babies were small for gestational age while 37% were appropriate for gestational age. The Ponderal index classified 9% as malnourished. Among 63 small for gestational age babies, 43 were small but not malnourished, while 3 out of 37 appropriate for gestational age babies were malnourished. When the Clinical Assessment of Nutritional Status score served as the reference standard, weight for gestational age demonstrated sensitivity and specificity of 94.12% and 64.29% respectively, while Ponderal index showed sensitivity and specificity of 25% and 94% respectively. Discussion: These findings indicate that small for gestational age and intrauterine growth retardation are not synonymous with fetal malnutrition. The Clinical Assessment of Nutritional Status score can identify fetal malnourishment in neonates that other methods fail to detect, proving superior to weight-based classification and Ponderal index in accurately identifying fetally malnourished neonates, including those with normal birth weights. This has important clinical implications for recognizing at-risk infants who require enhanced monitoring and intervention.