Psychometric properties of the beliefs about medicines questionnaire (BMQ) in mexican adults with asthma.

• Autores: Lugo Gonzalez, Isaias Vicente, Fabiola González Betanzos, Silvia Susana Robles Montijo, Cynthia Zaira Vega Valero
• Localización: International journal of psychology and psychological therapy, ISSN 1577-7057, Vol. 22, Nº. 1, 2022, págs. 33-43
• Idioma: inglés
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• Resumen

  • It has been identified that the treatment perception is associated with adherence behaviors and the clinical results in chronic diseases, hence the importance of having instruments to evaluate this variable. This work sought to evaluate the psychometric properties of the Spanish version of the Medication Belief Questionnaire (BMQ) in a clinical sample of 310 Mexican adults with asthma (74.2% women, Mage= 43.98, SD= 14.712). Six structural models are compared, including the original and the adaptation to Spanish. The results show a better fit to a model of three correlated factors (Necessity, Concern and Harm) with an excellent fit (χ2= 143.791. g= 87, p >.001, CFI= .967, TLI= .961, RMSEA= .05). Evidence of convergent and criterion validity with treatment adherence was obtained, corroborating the relationship between positive treatment perception and adherence behaviors (r= .421, p <.001) and negative treatment perception and non-adherence (r= -.223, p <.001). Furthermore, it was identified that patients with a positive treatment perception are more adherent than those with a negative treatment perception (χ2= 13.645, p <.001, OR= 2.462 [CI= 1.518-3.991]). It is concluded that the BMQ is a reliable and valid instrument to evaluate the treatment perception in Mexican patients with asthma, in addition to being sensitive to detect adherent and non-adherent patients.