Validation of a Semi-Quantitative Food Frequency Questionnaire for Use with an Adult South Indian Population
Journal Title: Indian Journal of Nutrition - Year 2018, Vol 5, Issue 2
Abstract
Objective: To assess the validity and reproducibility of a Food Frequency Questionnaire (FFQ) developed for assessing nutrient intake of South Indian adults. Design: An FFQ based on commonly used foods by rural and urban adults was developed and validated against 24-hour recalls. Setting: The study was conducted in urban, semi-urban and rural communities from Tamil Nadu, Chennai, India. Subjects: We recruited 8,080 participants of 20 or older years of age, 56% women, distributed as 2,221 urban, 2,821 semi-urban and 3,038 rural participants. Results: We developed and validated an FFQ, comparing it with data from single 24-hour recalls. For the total sample, and for men and for women, estimates of total energy and for macronutrients, were significantly higher when measured with the FFQ as compared to similar estimates from the recalls. Furthermore, with the dietary data from both methods, energy adjusted and log-transformed, we estimated the Pearson, Spearman’s and Lin’s rho correlation coefficients. Most of the coefficients were statistically significant (p ≤ 0.001) for all nutrients, except for vitamin A and selenium. Carbohydrate, zinc, protein, and niacin had the strongest correlation, ranging between 0.322 through 0.734. Conclusions: This study reports on the validation of a new instrument for dietary assessment of adults from Tamil Nadu, South India. Our FFQ demonstrated an acceptable agreement with the 24-hour recall, with high correlations in most macronutrients and some micronutrients. Future study should consider gathering data from the same participants at multiple occasions.
Authors and Affiliations
Thanikachalam M
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