REPRODUCIBILITY OF A DESIGNED SEMI-QUATITATIVE FOOD FREQUENCY QUESTIONAIRE IN GENERAL POPULATIONS IN THE NORTH VIETNAM
Objectives: To examine a reproducibility of a semi-quantitative food frequency questionnaire (SQFFQ) in general populations in the North Viet Nam in 2017. Methods: A Cross-sectional survey using methods of 24-hour recall records of food intake (24-FR, the reference group) in 300 households of three commune general populations that have 1,334 persons. SQFFQ was tested for 600 participants which found 310 participants eligible in linking with persons of 300 households. The R2, which was used to compare the energy and estimated nutrients obtained by both methods, was calculated before and after adjustment for total energy intake, age and sex, performed in STATA 10. Results: For macro nutrients intake estimated by two methods of 24-FR and SQFFQ, the intake amounts consisted of energy (kcalo, 1934.5 versus 1901.4); protid (gram, 87.8 versus 81.4); lipid (gram, 43.5 versus 41.7); and glucid (gram, 295.5 versus 294.5). there is a small correlation for lipid (adjusted R2=0.20); a moderate correlation for protid (adjusted R2= 0.38) and glucid (adjusted R2= 0.36), a strong correlation for energy (adjusted R2=0.53). Conclusions: The designed SQFFQ was being validated having good characteristics of feasibility, practical and reliability in the general populations located in the North Viet Nam.