What indicator suggests protein-calorie malnutrition in a patient?

The appropriate indicator for suggesting protein-calorie malnutrition in a patient is the measurement of triceps skinfold and arm muscle circumference. These anthropometric measurements are effective in assessing fat and muscle stores in the body, providing insight into nutritional status. A triceps skinfold measurement that is significantly low can indicate inadequate body fat stores, while a low arm muscle circumference can reflect decreased muscle mass, which together suggest protein-energy malnutrition.

When assessing malnutrition, both fat and muscle measures are critical. This dual measurement helps to provide a more comprehensive view of an individual's nutritional status, particularly in cases where general weight or body mass index alone might not reflect the underlying deficits in protein or calories consumed.

Body mass index, while useful, does not specifically evaluate muscle versus fat mass, making it less reliable for diagnosing protein-calorie malnutrition. Elevated liver enzymes and low blood pressure also do not specifically indicate malnutrition in the same way; they can be influenced by various other health issues. Thus, the specific focus on triceps skinfold and arm muscle circumference is what makes this choice the correct indicator for identifying protein-calorie malnutrition.