Abstract
Malnutrition in orthopaedic patients, a condition that is overlooked and understudied, has substantial effects on outcomes1-6. Underweight and malnourished elderly patients are at risk of experiencing reduced well-being and autonomy as well as increased mortality as compared with their counterparts of normal weight7. Malnutrition may be simply defined as an imbalance of energy, protein, and nutrients leading to functional and compositional adverse effects on the body8,9. By this definition, as much as 15% of ambulatory and 65% of hospitalized patients are malnourished10. Without adequate nutrition, orthopaedic patients are more susceptible to infections, slower healing rates, and sarcopenia (reduced lean body mass and muscle function)8. Stratifying malnutrition on the basis of etiology (e.g., “starvation-related,” “chronic disease-related,” and “acute injury or illness-related”) facilitates the formation of a more clinically relevant definition11. In starvation, the primary problem is reduced intake, possibly due to socioeconomic factors or secondary to anorexia6. With chronic disease and acute injury, increases in resting energy expenditure and protein requirements due to the inflammatory response contribute to malnourishment7. The new etiology-based approach to the diagnosis of malnutrition …
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