PMID- 38091680 OWN - NLM STAT- MEDLINE DCOM- 20240112 LR - 20240116 IS - 1090-2414 (Electronic) IS - 0147-6513 (Linking) VI - 269 DP - 2024 Jan 1 TI - Exploring the association between two groups of metals with potentially opposing renal effects and renal function in middle-aged and older adults: Evidence from an explainable machine learning method. PG - 115812 LID - S0147-6513(23)01316-7 [pii] LID - 10.1016/j.ecoenv.2023.115812 [doi] AB - BACKGROUND: Machine learning models have promising applications in capturing the complex relationship between mixtures of exposures and outcomes. OBJECTIVE: Our study aimed at introducing an explainable machine learning (EML) model to assess the association between metal mixtures with potentially opposing renal effects and renal function in middle-aged and older adults. METHODS: This study extracted data from two cycle years of the National Health and Nutrition Examination Survey (NHANES). Participants aged 45 years or older with complete data on six metals (lead, cadmium, manganese, mercury, and selenium) and related covariates were enrolled. The EML model was developed by the optimized machine learning model together with Shapley Additive exPlanations (SHAP) to assess the chronic kidney disease (CKD) risk with metal mixtures. The results from EML were further compared in detail with multiple logistic regression (MLR) and Bayesian kernel machine regression (BKMR). RESULTS: After adjusting for included covariates, MLR pointed out the lead and arsenic were generally positively associated with CKD, but manganese had a negative association. In the BKMR analysis, each metal was found to have a non-linear association with the risk of CKD, and interactions can exist between metals, especially for arsenic and lead. The EML ranked the feature importance: lead, manganese, arsenic and selenium were close behind in importance after gender, age or BMI for participants with CKD. Strong interactions between mercury and lead, manganese and cadmium and arsenic and manganese were identified by partial dependence plot (PDP) of SHAP and bivariate exposure-response effect plots of BKMR. The EML model determined the "trigger point" at which the risk of CKD abruptly changed. CONCLUSION: Co-exposure to metals with different nephrotoxicity could have different joint association with renal function, and EML can be a powerful method for studying complex exposure mixtures. CI - Copyright (c) 2023 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Chen, Haoran AU - Chen H AD - Institute of Medical Information/Library, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100020, China. FAU - Wang, Min AU - Wang M AD - Institute of Medical Information/Library, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100020, China. FAU - Li, Jiao AU - Li J AD - Institute of Medical Information/Library, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100020, China. Electronic address: li.jiao@imicams.ac.cn. LA - eng PT - Journal Article DEP - 20231212 PL - Netherlands TA - Ecotoxicol Environ Saf JT - Ecotoxicology and environmental safety JID - 7805381 RN - N712M78A8G (Arsenic) RN - 00BH33GNGH (Cadmium) RN - 42Z2K6ZL8P (Manganese) RN - H6241UJ22B (Selenium) RN - 0 (Metals) RN - FXS1BY2PGL (Mercury) RN - 0 (Metals, Heavy) SB - IM MH - Middle Aged MH - Humans MH - Aged MH - *Arsenic/analysis MH - Nutrition Surveys MH - Cadmium/toxicity/analysis MH - Manganese/toxicity/analysis MH - *Selenium/analysis MH - Environmental Exposure/analysis MH - Bayes Theorem MH - Metals MH - Kidney/chemistry MH - Machine Learning MH - *Mercury/toxicity/analysis MH - *Renal Insufficiency, Chronic/chemically induced/epidemiology MH - *Metals, Heavy/toxicity/analysis OTO - NOTNLM OT - Chronic kidney disease OT - Explainable machine learning OT - Metal mixtures OT - Multiply statistical methods COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/12/14 00:42 MHDA- 2024/01/12 06:43 CRDT- 2023/12/13 18:02 PHST- 2023/03/27 00:00 [received] PHST- 2023/11/12 00:00 [revised] PHST- 2023/12/08 00:00 [accepted] PHST- 2024/01/12 06:43 [medline] PHST- 2023/12/14 00:42 [pubmed] PHST- 2023/12/13 18:02 [entrez] AID - S0147-6513(23)01316-7 [pii] AID - 10.1016/j.ecoenv.2023.115812 [doi] PST - ppublish SO - Ecotoxicol Environ Saf. 2024 Jan 1;269:115812. doi: 10.1016/j.ecoenv.2023.115812. Epub 2023 Dec 12.