| II ECCTS | Second Central American Survey of Working Conditions and Health |
| CKD | chronic kidney disease |
| CKDu | chronic kidney disease of unknown origin |
| eGFR | estimated glomerular filtration rate |
| GIS | geographic information system |
| DEGREE | Disadvantaged Populations Estimated Glomerular Filtration Rate (eGFR) Epidemiology Study |
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