Construction of an individual socioeconomic status index for analysing inequalities in colorectal cancer screening

Mercedes Vanaclocha-Espí, Marina Pinto-Carbó, Javier Martín-Pozuelo, Paula Romeo-Cervera, Rosana Peiró-Pérez, Carmen Barona, Francisco Ortiz, Andreu Nolasco, Susana Castán, Dolores Salas and Ana Molina-Barceló

PLOS ONE, 2022, vol. 17, issue 12, 1-15

Abstract: Objective: To construct an individual socioeconomic status index (ISESI) with information available in the Population Information System of the Region of Valencia, Spain, and use it to analyse inequalities in a colorectal cancer screening programme (CRCSP). Methods: Cross-sectional study of men and women aged between 50 and 75 at the time of the study (2020) that were selected from the target population of the Region of Valencia CRCSP. (study sample 1,150,684). First, a multiple correspondence analysis was performed to aggregate information from the Population Information System of the Region of Valencia into an ISESI. Second, data from the 2016 Region of Valencia Health Survey were used for validation, and finally the relationship between CRCSP participation and the ISESI was analysed by logistic regression models. Results: The variables included in the index were nationality, employment status, disability, healthcare coverage, risk of vulnerability and family size. The most important categories for determining the highest socioeconomic status were being employed and not being at risk of social vulnerability, and being unemployed and at risk of social vulnerability for determining the lowest socioeconomic status. Index validation demonstrated internal and external coherence for measuring socioeconomic status. The relationship between CRCSP participation and the ISESI categorised by quartile (Q) showed that Q4 (the lowest socioeconomic status) was less likely to participate OR = 0.769 (0.757–0.782) than Q1 (the highest socioeconomic status), and the opposite was found for Q2 OR = 1.368 (1.347–1.390) and Q3 OR = 1.156 (1.137–1.175). Conclusions: An ISESI was constructed and validated using Population Information System data and made it possible to evaluate inequalities in colorectal cancer screening.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0278275

DOI: 10.1371/journal.pone.0278275

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