Mostafavi Firoozeh, Najimi Arash, Sharifirad Gholamreza, Golshiri Parastoo
Department of Health Education and Health Promotion, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Public Health, Faculty of Health, Qom University of Medical Sciences, Qom, Iran.
Mater Sociomed. 2016 Jul 24;28(4):298-302. doi: 10.5455/msm.2016.28.298-302.
Despite the importance of patients believes as one of the most important predictors of treatment adherence behavior, it is rarely considered in numerous studies. Then the current survey was aimed to develop and study the beliefs about medicines questionnaire (BMQ) in patients with hypertension.
The BMQ developed by Horn and et al. was used in the current study. This questionnaire included 18 questions in both public and private beliefs regarding drug. Face and content validity of the tool was investigated using expert's panel. In final, aforementioned tool was tested in 612 participants. To explore structure validity and internal consistency, exploratory and confirmatory factor analysis and alpha coefficient was conducted. To evaluate the final validity of instrument, the mean score of the beliefs about medicines of patients with appropriate medication adherence were compared to patients without medication adherence.
The mean age of patients was 44.08 ± 10.38 years. Women were 314 of participants. Calculated face validity by the impact score for each item indicated that all the items of the questionnaire had the impact score of more than 1.5. In total, all items had scored higher than 0.79 by considering 18 items for content validity. The average of content validity index for the questionnaire was 0.93. Load of factors were in the range of 0.51 to 0.79. Four items explained % 57 of the total variance. Comparison of all instrument items in the two groups showed that patients with good adherence had higher score in 15 items (% 83 of all items).
The findings suggested that the BMQ in patients with hypertension as a valid and reliable instrument can be used to evaluate the patients' medication adherence.
尽管患者信念作为治疗依从行为最重要的预测因素之一很重要，但在众多研究中却很少被考虑。因此，本次调查旨在开发并研究高血压患者的药物信念问卷（BMQ）。
本研究使用了由霍恩等人开发的BMQ。该问卷包括18个关于药物的公众和个人信念方面的问题。使用专家小组对该工具的表面效度和内容效度进行了调查。最后，在612名参与者中对上述工具进行了测试。为了探索结构效度和内部一致性，进行了探索性和验证性因素分析以及α系数分析。为了评估该工具的最终效度，将药物治疗依从性良好的患者的药物信念平均得分与无药物治疗依从性的患者进行了比较。
患者的平均年龄为44.08±10.38岁。女性参与者有314人。通过每个项目的影响得分计算的表面效度表明，问卷的所有项目的影响得分均超过1.5。总体而言，考虑到18个项目的内容效度，所有项目的得分均高于0.79。该问卷的内容效度指数平均值为0.93。因素负荷在0.51至0.79范围内。四个项目解释了总方差的57%。两组中所有工具项目的比较表明，依从性良好的患者在15个项目中得分更高（占所有项目的83%）。
研究结果表明，高血压患者中的BMQ作为一种有效且可靠的工具，可用于评估患者的药物治疗依从性。
