| Abstrak/Abstract |
Purpose To test the validity and reliability of the Indonesian version of the dietary sodium restriction questionnaire (DSRQ-I) among patients with hypertension.
Methods The cross-sectional study enrolled hypertensive patients from a cardiac outpatient department in Indonesia using convenience sampling. Eligible patients received a demographic questionnaire and DSRQ-I during a one-month period of data collection. Content and construct analysis examined the validity while internal consistency assessment checked reliability. Participation required 10-15 minutes on average.
Results One hundred and thirty–five patients participated: mostly females (54.1%), married (82.9%) with mean age of 58±10 years. The I-CVI was .97 and S-CVI was .81 for DSRQ-I. The KMO test was .83, indicating adequate sampling and the Bartlett’s test of sphericity reached significant result (p < .001). The PCA indicated three components with 64.2% explained variance including perceived behavioral control (35.5%), attitude (19.3%) and subjective norm (9.4%). CFA produced a parsimonious model on the three factor outcome by removing a single item. The indices of good fit model was achieved at x2/df = 2.17, GFI = .85, RMSEA = .09, SRMR = .07, Bentler CFI = .90 (p < .001). Cronbach’s alpha coefficients for attitude, subjective norm and perceived behavioral control were .85, .87 and .85, respectively. All inter-item and item-total correlations indicated adequate outcome and acceptable result. Consequently, 15 items were determined reliable measurement and included as the final version of DSRQ-I.
Conclusions The DSRQ-I is a valid and reliable instrument to measure facilitators and barrier of sodium restriction among hypertensive patients in Indonesia.
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