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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比较配置增强型儿童MicroPEM （ECM）在危地马拉农村地区PM2.5个人暴露样本的重量和浊度测量中的性能和可靠性

用于个人空气污染暴露测量的传统重力仪器通常笨重且噪声大，不能提供实时评估能力。增强型儿童MicroPEM （ECM）是一种相对轻便和安静的仪器，旨在捕获基于集成过滤器的重量样品和实时连续（浊度测量）空气动力学直径为2.5 μm或更小的颗粒物（PM2.5）浓度。我们在危地马拉的一项随机对照试验中评估了一组孕妇中配置ecm的性能和可靠性，该试验测试了用于烹饪的液化石油气（LPG）炉灶（干预）与生物质（对照）。我们使用Spearman相关和Bland-Altman协议比较了配对重量（n = 219）和配对调整浊度（n = 221）样本的日均（24 h） PM2.5浓度；我们还根据类内相关系数（ICC）和均方根误差（RMSE）评估了信度。对照组和LPG干预组PM2.5浓度中位数分别为93.5 μg/m3（四分位数间距IQR = 52.6 ~ 160.5）和21.4 μg/m3（四分位数间距IQR = 12.0 ~ 32.0）；对照组和LPG组调整后浊度浓度中位数分别为83.7 μg/m3 （IQR = 47.6 ~ 148.9）和22.6 μg/m3 （IQR = 17.5 ~ 29.7）。在重量比较中，对照组的Spearman相关性（0.91）高于LPG干预组（0.67）。在对照组（0.92）和干预组（0.75）调整后的浊度测量中也观察到同样的趋势。ICC值在重力（0.93）和浊度（0.95）搭配中都很高。重量配色（26.69 μg/m3）和浊度配色（31.76 μg/m3）的均方根误差差异较小。我们的研究结果表明，在危地马拉农村地区，对PM2.5个人暴露样本进行重量法和调整浊度法比对的ecm具有很强的可靠性。试验注册：ClinicalTrials.gov标识符：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.