Bifactor SEM and MIRT Structure of a 12-Item Human Immunodeficiency Virus Stigma Scale in Peruvian Adults

Author:

Ramos-Vera Cristian1,Basauri-Delgado Miguel2,Diaz Peña Misael1,Tinoco Alberto Jose1,Perez Arroyo Karen1,Herrera Mamani Betsabel1,Sánchez-Villena Andy3,Saintila Jacksaint4ORCID

Affiliation:

1. Universidad César Vallejo, Lima, Peru

2. Universidad Femenina del Sagrado Corazón, Lima, Peru

3. Universidad Privada del Norte, Cajamarca, Peru

4. Universidad Peruana Unión, Lima, Peru

Abstract

Background: The stigma associated with human immunodeficiency virus (HIV) can lead to prejudice and discrimination against people who have been infected by this virus, consequently, it is important to have a validated tool to measure this phenomenon. However, there is only 1 national precedent that has validated the scores of this instrument in its 21-item version. Therefore, this study examined the bifactor structural equation method (SEM) and multidimensional item response theory (MIRT) structure of a 12-item human immunodeficiency virus stigma scale in Peruvian adults. Methods: We evaluated 342 patients (57.6% female and 42.45% male) diagnosed with HIV receiving highly active antiretroviral therapy (HAART) from a hospital located in East Lima, aged 18 to 45 years ( M = 31.4, SD = 9.79). A SEM was used to test 2 measurement models, a 4-factor correlated oblique model and a bifactor model due to high interfactor relationships. Results: Acceptable fit indices were identified for the oblique model (χ2/df = 1.26, SRMR = 0.044, RMSEA [90% CI] = 0.028 [0.000-0.047], CFI = 0.996, TLI = 0.994). In the same way, similar results were evident for the bifactor model (χ2/df = 1.14, SRMR = 0.039, RMSEA [90% CI] = 0.020 [0.000-0.044], CFI = 0.998, TLI = 0.997), however, in the latter it showed a greater explanation for the unidimensional model ( H = 0.87, PUC = 0.82, LCA = 0.70), which was also evidenced by the bifactor MIRT analysis. Conclusion: It is concluded that the 12-item HIV Stigma Scale meets the psychometric properties of internal structure and unifactorial reliability.

Publisher

SAGE Publications

Subject

Public Health, Environmental and Occupational Health,Community and Home Care

Reference60 articles.

1. World Health Organization. HIV. Global Health Observatory. 2022. Accessed October 14, 2022. https://www.who.int/data/gho/data/themes/hiv-aids

2. World Health Organization. Infección por el VIH. 2022. Accessed October 14, 2022. https://www.who.int/es/news-room/fact-sheets/detail/hiv-aids

3. Ministerio de Salud. Gobierno del Perú. VIH y SIDA. Prevención y control de VIH-SIDA, enfermedades de transmisión sexual (ETS) y hepatitis. Minsa. 2022. Accessed October 16, 2022. https://www.gob.pe/16439

4. Development of a 12-item short version of the HIV stigma scale

5. Prevalencia de diagnóstico tardío en infección por VIH

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