Reliability and validity analysis of the Spanish version of the Diabetes Quality of Life (EsDQoL) questionnaire in adults with diabetes mellitus undergoing insulin treatment at a General Acute Care Hospital in the Autonomous City of Buenos Aires
DOI:
https://doi.org/10.47196/diab.v59i2.1169Keywords:
quality of life, diabetes mellitus, Diabetes Quality of Life (DQoL), validation, ArgentinaAbstract
Introduction: diabetes mellitus (DM) is a chronic disease that affects health-related quality of life (HRQoL). The “Diabetes Quality of Life” (DQoL) questionnaire has been widely used to assess this impact. Its Spanish version (EsDQoL) has demonstrated satisfactory psychometric properties, although it is necessary to verify its validity in the local context.
Objectives: to analyze the reliability and validity of the Spanish version of the EsDQoL in adults with DM undergoing insulin treatment, attended at a general acute care hospital in the Autonomous City of Buenos Aires (CABA), Argentina.
Materials and methods: an observational, prospective, and validation study was conducted on individuals over 18 years of age with DM on insulin treatment, without associated complications. Two quality of life measurement instruments were administered: the EsDQoL and the Short Form-12 (SF-12), in a specialized clinic of a general acute care hospital in CABA, Argentina, during 2022–2024. HRQoL was measured using the EsDQoL and compared with the SF-12 for criterion validity. Correlations, internal consistency (Cronbach’s alpha), and test-retest reliability (intraclass correlation coefficient, ICC) were analyzed. Construct validity was evaluated by comparing EsDQoL scores according to age, health coverage, HbA1c, type of treatment, and physical activity.
Results: 83 individuals participated, of which 52 were women (62.6%) and 31 men (34.7%), with an average age of 52.8 years (14.2). Regarding the type of DM, 59 participants (71%) had DM2, with a mean disease duration of 12.7 years (8.9). Regarding the treatment regimen, 57 patients (68.7%) were treated conventionally, with an average duration of 8.2 years (6.3). In the reliability analysis, positive correlations were found for the dimensions and the total score of the EsDQoL (rho=0.43-0.79) and internal consistency coefficients from acceptable to excellent (0.64-0.90). A moderate correlation was observed between the total scores of the EsDQoL and the SF-12 (rho=0.64; p<0.001). Regarding construct validity, statistically significant differences were found in age, health coverage, HbA1c, type of treatment and physical activity (p<0.05).
Conclusions: the EsDQoL demonstrated adequate reliability and validity for measuring quality of life in people with DM undergoing insulin treatment. The Social/Vocational Concern dimension exhibited lower stability, attributable to its subjective nature. These findings reinforce the utility of the EsDQoL in clinical practice and future research, highlighting the influence of individual and contextual factors.
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