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Repeatability of a Short Food Frequency Questionnaire to Assess Calcium Intake in Older Australians

Journal of Aging Research
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Objective. To assess the repeatability of the validated Flinders Calcium Food Frequency Questionnaire ( F F Q C A ) for estimating dietary calcium intake in a sample of community dwelling older Australians. Methods. A test-retest repeatability study involving 100 subjects ( ≥ 65 years) living independently in metropolitan Adelaide, Australia. Estimates of daily calcium intake from the first ( F F Q C A 1 ) and repeated administration ( F F Q C A 2 ) were calculated from two versions (35-item and 15-item) of the F F Q C A . The intraclass correlation coefficient (ICC) was used to assess the repeatability. Results. Moderate and comparable ICC values ( 𝑟 = 0 . 5 , 𝑟 = 0 . 6 ) were found across the two versions of the F F Q C A . Conclusion. Both F F Q C A versions demonstrated moderate repeatability, supporting the results of previous studies.

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