Abstract
Purpose
The body mass index (BMI) before lung transplantation (LT) is a benchmark of the post-LT survival. The aim of the study is to determine the BMI inadequate for the post-LT survival.
Methods
We examined the survival after LT in patients grouped into the following BMI categories: <18.5 kg/m2 (underweight), 18.5–24.9 kg/m2 (normal weight), 25–29.9 kg/m2 (overweight), and ≥30.0 kg/m2 (obese) according to the World Health Organization (WHO) criteria. A more detailed categorization was made for further evaluation of the underweight group: mild (17.0 ≤ BMI < 18.5 kg/m2) and severely underweight (BMI <17.0 kg/m2).
Results
There was no statistically significant difference in the post-LT survival between underweight and normal-weight patients (5-year survival: 78.7 vs. 76.1%). Patients with BMI <17.0 kg/m2 had a worse prognosis than those with 17.0 ≤ BMI < 18.5 kg/m2 (5-year survival: 70.3 vs. 90.0%).
Conclusions
Standard BMI categorization per the WHO criteria is inadequate for determining the post-LT survival, especially in underweight patients. For the nutritional evaluation of underweight pre-LT patients, BMI <17.0 kg/m2 should be used instead of BMI <18.5 kg/m2.
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Komatsu, T., Chen-Yoshikawa, T.F., Oshima, A. et al. Severe underweight decreases the survival rate in adult lung transplantation. Surg Today 47, 1243–1248 (2017). https://doi.org/10.1007/s00595-017-1508-8
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DOI: https://doi.org/10.1007/s00595-017-1508-8