[RELIABILITY AND COMPLETION OF THE WORKING CONDITIONS ITEMS INCLUDED IN THE CTESLAC QUESTIONNAIRE: RESULTS FROM THE STUDY OF WORKING CONDITIONS, SAFETY AND HEALTH IN PERU].

Objective: To assess the reliability and degree of completion of items on working conditions in the Working Conditions, Employment Conditions and Health in Latin America and the Caribbean (CTESLAC by its Spanish acronym) survey questionnaire.

Methods: In 2017, we conducted 500 household-based interviews in Peru using the Survey on Working Conditions, Safety and Health CTESLAC Questionnaire. We calculated: 1) percentage of respondents indicating "Do not know"/"No answer"; 2) percentage of unanswered items; 3) variance of these items; 4) percentages for each of the response categories; and we generated 5) an item-item correlation matrix for each dimension; and 6) an item-dimension correlation matrix.

[Basic questionnaire and methodological criteria for Surveys on Working Conditions, Employment, and Health in Latin America and the Caribbean].

This article aimed to present a basic questionnaire and minimum methodological criteria for consideration in future Surveys on Working Conditions, Employment, and Health in Latin America and the Caribbean. A virtual and face-to-face consensus process was conducted with participation by a group of international experts who used the surveys available up until 2013 as the point of departure for defining the proposal. The final questionnaire included 77 questions grouped in six dimensions: socio-demographic characteristics of workers and companies; employment conditions; working conditions; health status; resources and preventive activities; and family characteristics.

[Levels of heavy metals in the environment and population exposure after five years of mineral exploration in the Las Bambas project, Peru 2010].

Objectives: Determine particulate matter (PM10) and heavy metals concentrations in the environment, as well as in surrounding communities of the Las Bambas project after five years of mineral exploration.

Materials And Methods: A comparative cross-sectional study was conducted in three districts in the area of influence of the Las Bambas project in Apurimac, Peru. Samples of water, air and soil were obtained to determine the concentrations of PM10 and heavy metals.

[Comunicable diseases, mental health and exposure to environmental pollutants in population living near Las Bambas mining project before exploitation phase, Peru 2006].

Objective: To determine the prevalence of communicable diseases, mental health and environmental pollutants exposure in population living near Las Bambas mining project before exploitation phase.

Material And Methods: Cross sectional study performed in 453 subjects (children and adults) living in three Apurimac region districts: Haquira, Chalhuahuacho and Progreso. Psychomotor development, intelligence quotient, anxiety and depression levels and the presence of communicable diseases (viral hepatitis B, C and delta, syphilis and HIV) were evaluated, as well as heavy metals (lead in blood, and cadmium, arsenic and mercury in urine samples) and serum cholinesterase levels.