Comparing Performance and Reliability of Collocated Enhanced Children’s MicroPEM (ECM) on Gravimetric and Nephelometric PM2.5 Personal Exposure Samples in Field Measurements in Rural Guatemala

IF 4.3 2区环境科学与生态学 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Indoor air Pub Date : 2025-01-02 DOI:10.1155/ina/8812602

Erick Mollinedo, John P. McCracken, Michael Johnson, Ricardo Piedrahita, Ajay Pillarisetti, Lance A. Waller, Jiantong Wang, Lisa M. Thompson, Anaite Diaz-Artiga, Oscar de Leon, Alexander Ramirez, Alejandro Polanco, Devan Campbell, Katherine A. Kearns, Jacob Kremer, Laura Nicolaou, Maggie L. Clark, Kalpana Balakrishnan, Ghislaine Rosa, Jennifer L. Peel, William Checkley, Thomas F. Clasen, Luke P. Naeher

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Abstract

Traditional gravimetric instruments used for personal air pollution exposure measurements are often cumbersome and noisy and do not offer real-time assessment capability. The Enhanced Children’s MicroPEM (ECM) is a comparatively lightweight and quiet instrument designed to capture both integrated filter-based gravimetric samples and real-time continuous (nephelometric) particulate matter with an aerodynamic diameter of 2.5 μm or less (PM_2.5) concentrations. We assessed the performance and reliability of collocated ECMs in a subset of pregnant women participating in a randomized controlled trial in Guatemala to test a liquefied petroleum gas (LPG) cookstove (intervention) versus biomass (control) for cooking. We compared average daily (24 h) PM_2.5 concentrations for the paired gravimetric (n = 219) and paired adjusted nephelometric (n = 221) samples using Spearman correlation and Bland–Altman agreement; we also assessed reliability based on the intraclass correlation coefficient (ICC) and root mean square error (RMSE). Median PM_2.5 gravimetric concentrations were 93.5 μg/m³ (interquartile range (IQR) = 52.6–160.5) and 21.4 μg/m³ (IQR = 12.0–32.0) in the control and LPG intervention groups, respectively; the median adjusted nephelometric concentrations were 83.7 μg/m³ (IQR = 47.6–148.9) and 22.6 μg/m³ (IQR = 17.5–29.7) in the control and LPG groups, respectively. Spearman correlations were higher in the control arm (0.91) than in the LPG intervention arm (0.67) in the gravimetric comparisons. The same trend was observed for adjusted nephelometric measurements in the control (0.92) and intervention arms (0.75). ICC values were high in both gravimetric (0.93) and nephelometric (0.95) collocations. Small differences in RMSE were observed for the gravimetric (26.69 μg/m³) and nephelometric collocations (31.76 μg/m³). Our findings demonstrate strong reliability between collocated ECMs for both gravimetric and adjusted nephelometric PM_2.5 personal exposure samples in rural Guatemala.

Trial Registration: ClinicalTrials.gov identifier: NCT02944682

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来源期刊

Indoor air 环境科学-工程：环境

CiteScore

10.80

自引率

10.30%

发文量

175

审稿时长

3 months

期刊介绍： The quality of the environment within buildings is a topic of major importance for public health. Indoor Air provides a location for reporting original research results in the broad area defined by the indoor environment of non-industrial buildings. An international journal with multidisciplinary content, Indoor Air publishes papers reflecting the broad categories of interest in this field: health effects; thermal comfort; monitoring and modelling; source characterization; ventilation and other environmental control techniques. The research results present the basic information to allow designers, building owners, and operators to provide a healthy and comfortable environment for building occupants, as well as giving medical practitioners information on how to deal with illnesses related to the indoor environment.