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Construction and validation of the area level deprivation index for health research: A methodological study based on Nepal Demographic and Health Survey

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  • Ishor Sharma
  • M Karen Campbell
  • Marnin J Heisel
  • Yun-Hee Choi
  • Isaac N Luginaah
  • Jason Mulimba Were
  • Juan Camilo Vargas Gonzalez
  • Saverio Stranges

Abstract

Area-level factors may partly explain the heterogeneity in risk factors and disease distribution. Yet, there are a limited number of studies that focus on the development and validation of the area level construct and are primarily from high-income countries. The main objective of the study is to provide a methodological approach to construct and validate the area level construct, the Area Level Deprivation Index in low resource setting. A total of 14652 individuals from 11,203 households within 383 clusters (or areas) were selected from 2016-Nepal Demographic and Health survey. The index development involved sequential steps that included identification and screening of variables, variable reduction and extraction of the factors, and assessment of reliability and validity. Variables that could explain the underlying latent structure of area-level deprivation were selected from the dataset. These variables included: housing structure, household assets, and availability and accessibility of physical infrastructures such as roads, health care facilities, nearby towns, and geographic terrain. Initially, 26-variables were selected for the index development. A unifactorial model with 15-variables had the best fit to represent the underlying structure for area-level deprivation evidencing strong internal consistency (Cronbach’s alpha = 0.93). Standardized scores for index ranged from 58.0 to 140.0, with higher scores signifying greater area-level deprivation. The newly constructed index showed relatively strong criterion validity with multi-dimensional poverty index (Pearson’s correlation coefficient = 0.77) and relatively strong construct validity (Comparative Fit Index = 0.96; Tucker-Lewis Index = 0.94; standardized root mean square residual = 0.05; Root mean square error of approximation = 0.079). The factor structure was relatively consistent across different administrative regions. Area level deprivation index was constructed, and its validity and reliability was assessed. The index provides an opportunity to explore the area-level influence on disease outcome and health disparity.

Suggested Citation

  • Ishor Sharma & M Karen Campbell & Marnin J Heisel & Yun-Hee Choi & Isaac N Luginaah & Jason Mulimba Were & Juan Camilo Vargas Gonzalez & Saverio Stranges, 2023. "Construction and validation of the area level deprivation index for health research: A methodological study based on Nepal Demographic and Health Survey," PLOS ONE, Public Library of Science, vol. 18(11), pages 1-10, November.
  • Handle: RePEc:plo:pone00:0293515
    DOI: 10.1371/journal.pone.0293515
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    References listed on IDEAS

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