<![CDATA[Background: Blood pressure control in elderly patients with hypertension largely depends on adherence to recommended dietary patterns, yet validated instruments based on the Health Belief Model (HBM) to assess hypertension diet compliance are limited. Objectives: To evaluate the validity and reliability of an HBM-based questionnaire for assessing diet compliance among elderly people with hypertension. Methods: A quantitative study with a cross-sectional design was conducted among 153 elderly hypertensive patients at the Jembatan Kecil Primary Health Center in Bengkulu City. Data were collected through interviews using a characteristics questionnaire and an HBM-based hypertension diet compliance questionnaire comprising 6 domains (perceived susceptibility, severity, benefits, barriers, self-efficacy, cues to action) and 40 Likert-scale items. Item validity was assessed using Pearson correlation with the criterion r count ≥ r table (0.1587; α = 0.05), while reliability was evaluated using Cronbach’s alpha ≥ 0.70. Results: Of the 40 items, 37 met the validity criterion with r count ranging from 0.210 to 0.513, and all domains demonstrated high reliability with Cronbach’s alpha values between 0.71 and 0.98; the overall Cronbach’s alpha for the 37 items was 0.82. Conclusion: The HBM-based hypertension diet compliance questionnaire consisting of 37 items is valid and reliable, and can be used as a measurement tool to assess diet compliance in elderly individuals with hypertension.]]>
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