Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 54 3 2025 03 04 454 464 Xu Cao Department of Healthcare Ward, Peking University People’s Hospital, Peking, China Chenxia Liu Department of Healthcare Ward, Peking University People’s Hospital, Peking, China Qiuyue Liu Department of Healthcare Ward, Peking University People’s Hospital, Peking, China Jian Gao 1. Department of Thoracic Surgery, Peking University People's Hospital, Peking, China 2. Thoracic Oncology Institute, Peking University People's Hospital, Peking, China Yan Wang Department of Healthcare Ward, Peking University People’s Hospital, Peking, China Feng Yang 1. Department of Thoracic Surgery, Peking University People's Hospital, Peking, China 2. Thoracic Oncology Institute, Peking University People's Hospital, Peking, China 2024 09 27 2024 11 25 Background: We aimed to appraise and compare the impact of inadequate nutrition in lung transplant recovery. Methods: Based on the inspection of the meta-analysis data, the odds ratio (OR) and mean difference (MD) with 95% confidence intervals (CIs) were derived by dichotomous random or fixed effect models. 6 papers with 1399 lung transplant who were available between 2020 and 2024 were comprised in this meta-analysis. Results: Frail had significantly higher hospital length of stay (MD, 2.80; 95% CI, 1.80-3.80, P< 0.001), and all-cause mortality (OR, 2.33; 95% CI, 1.40-3.87, P=0.001) compared to non-frail in subjects with lung transplant. However, no significant difference was found between frail and non-frail in intubation post-lung transplant (MD, 7.00; 95% CI, -17.52-31.52, P=0.58), and intensive care unit length of stay (MD, -1.70; 95% CI, -4.53- 1.14, P=0.24) in subjects with lung transplant. Conclusion: Using frail had significantly higher hospital length of stay, and all-cause mortality, however, no significant difference was found in intubation post-lung transplant, and intensive care unit length of stay compared to non-frail in subjects with lung transplant However, given that comparisons comprised a small number of studies, attention ought to be given to their values. https://ijph.tums.ac.ir/index.php/ijph/article/view/36745 https://ijph.tums.ac.ir/index.php/ijph/article/download/36745/8485