Validating a semi-quantitative food frequency questionnaire to assess regional diet in a study of cancer in South West Nigeria.

PURPOSE: Cancer burden is rising rapidly in Nigeria, the most populous country in sub-Saharan Africa; this trend may in part be attributable to diet. We developed and validated a semi-quantitative food frequency questionnaire (FFQ) to assess regional diet in Nigeria. METHODS: We recruited 68 adult participants from rural and urban settings in South West Nigeria. We developed an FFQ administered at baseline and assessed its validity using 3 dietary recalls (baseline, 7 days post baseline, 3 months post baseline). We calculated Spearman's rank correlation coefficients and energy-adjusted de-attenuated correlation coefficients for food items and macronutrients. We evaluated cross-classification using quartiles of macronutrient intake. RESULTS: Energy-adjusted de-attenuated food item correlations between the FFQ and dietary recalls ranged from -0.08 (smoked beef/goat) to 0.73 (fried snacks) for the average intake from the first 2 recalls (2DR) and from -0.05 (smoked beef/goat) to 0.75 (smoked fish) for the average of all 3 recalls (3DR). Macronutrient correlations ranged from 0.15 (fat) to 0.37 (fiber) for the 2DR and from 0.08 (fat) to 0.41 (carbohydrates) for the 3DR. The percent of participants classified in the same quartile ranged from 16.4% (fat) to 32.8% (fiber, protein) for the 2DR and from 25.6% (fat) to 34.9% (carbohydrates) for the 3DR. Agreement improved when including adjacent quartiles, from 65.5% (carbohydrates) to 70.5% (fat, fiber) for the 2DR and from 62.8% (protein) to 76.8% (carbohydrate) for the 3DR. CONCLUSION: Our semi-quantitative FFQ was reasonably valid for ranking intake of certain foods and macronutrients in adults in South West Nigeria.

Nutritional status and feeding habits of females in public and private Universities in Osun state, Southwestern, Nigeria.

This study examined the dietary habits, nutritional status and socio-demographic characteristics of female undergraduates in selected public and private Universities in Osun State, Southwestern, Nigeria. The anthropometric assessment of selected respondents consisted measurements of height, weight, body circumferences, body mass index and waist-to-hip ratio of respondents. The food frequency questionnaire technique was adopted to evaluate the feeding/dietary habits using well-constructed questionnaires. The results showed that over 60% of students in both public and private Universities fell within 18.5-24.9 kg/m2, the normal weight range of body mass index according to the World Health Organisation classification. From the waist-to-hip ratio result over 60% were not at risk of non-communicable disease. The respondents were fond of snacking (74.9%) and skipping of meals (86.0%) especially breakfast (52.4%). There was a significant difference (p < 0.05) in the allowances (pocket money) of students where 33.7% of private University students received over N16,000 as compared to 12% of public University students. There was no significant difference (p > 0.05) between the nutritional status of students in public and private Universities. In conclusion, the nutritional status and the dietary habits/pattern of female undergraduate students are influenced by type of schools and other underlying factors.