Urinary Hydroxyproline Index = Urinary Hydroxyproline Concentration (mmol/L) / Urinary Creatinine Concentration (mmol/L) × kg (Weight)

Normal preschool children: 2.0~5.0

Children with severe protein-energy malnutrition (PEM) have reduced urinary hydroxyproline excretion, which is related to growth rate. Thus, the urinary hydroxyproline index can be used to evaluate the protein-energy nutritional status of children. Those with slow growth have a value <2.0.