A culture-sensitive quantitative food frequency questionnaire used in an African population: 2. Relative validation by 7-day weighed records and biomarkers

Objective: FFQ are often used to estimate food and nutrient intakes to rank individuals by their level of intake. We evaluated the relative validity of a semiquantitative FFQ created for use in Tanzania by comparing it with two 24 h diet recalls. Design: We measured relative validity of the FFQ with deattenuated energyadjusted rank correlations for nutrients, deattenuated rank correlations for food groups, and performed a cross-classification analysis of energy-adjusted nutrient quartiles using percentage of agreement and Bland-Altman analysis. Setting: Interviews were conducted in 2014 in participants' homes in Ukonga, Dar es Salaam, Tanzania. Subjects: We surveyed 317 adults aged 40 years or older from the general public. Results: Deattenuated energy-adjusted rank correlation coefficients of nutrients ranged from −0·03 for riboflavin to 0·41 for percentage of energy from carbohydrates, with a median correlation of 0·21. Coefficients for food groups ranged from 0·00 for root vegetables to 0·51 for alcohol, with a median of 0·35. Relative to the average of the two 24 h diet recalls, the FFQ overestimated energy intake and intakes of all nutrients and food groups, other than tea, with ratios among nutrients ranging from 1·34 for SFA to 7·08 for vitamin A; and among food groups from 0·92 for tea to 9·00 for fruit. The percentage of participants classified into the same nutrient intake quartile ranged from 23 % for SFA to 32 % for both niacin and pantothenic acid, with a median of 28 %. Conclusions: The FFQ performed moderately well in urban Tanzanian adults.

Section: Discussionmentioning

confidence: 99%

Validity of an FFQ to measure nutrient and food intakes in Tanzania

Zack

Irema

Kazonda

et al. 2018

“…In addition, the technique has the advantage of being relatively easy to administer and analyse, thereby incurring lower costs compared with other methods of dietary assessment (3) . The use and limitations of the FFQ have been extensively reviewed and the method can be prone to measurement errors; thus validation studies are an essential step in the development of new FFQ.Whereas FFQ have been developed and validated for many developed and developing economies, there are few published reports of validated instruments designed to measure habitual diet in African populations, except for subgroups in South Africa (4)(5)(6) , Mali (7,8) and Cameroon (9) . Investigations of diet-disease relationships require that the dietary assessment method adequately estimates intake; hence it is essential that the FFQ is developed and validated in the population being studied in order to be culturally…”

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confidence: 99%

“…Whereas FFQ have been developed and validated for many developed and developing economies, there are few published reports of validated instruments designed to measure habitual diet in African populations, except for subgroups in South Africa (4)(5)(6) , Mali (7,8) and Cameroon (9) . Investigations of diet-disease relationships require that the dietary assessment method adequately estimates intake; hence it is essential that the FFQ is developed and validated in the population being studied in order to be culturally *Corresponding author: Email maria.jackson@uwimona.edu.jm r University of the West Indies 2012…”

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confidence: 99%

Validation and reproducibility of an FFQ for use among adults in Botswana

Jackson

Motswagole

Kwape

et al. 2012

Objective: To evaluate the validity and reproducibility of a 122-item intervieweradministered quantitative FFQ developed to determine food and nutrient intakes of adults in Botswana. Design: Relative validity of the FFQ was evaluated by comparing nutrient and food group intakes against four non-consecutive 24 h recalls administered over 12 months. The FFQ was repeated after 1 year to assess reproducibility. Setting: Kanye, Botswana. Subjects: Seventy-nine adults aged 18-75 years. Results: Spearman correlation coefficients for the validity of energy-adjusted nutrients ranged from 0?42 (carbohydrate) to 0?49 (protein) for macronutrients and from 0?23 (Fe) to 0?44 (PUFA) for micronutrients. Exact agreement of quartile distribution for nutrients between the FFQ and recalls ranged from 27 % to 72 %. Weighted kappa values were lowest for retinol (0?13), Fe (0?22) and b-carotene (0?25) and ranged from 0?33 (SFA) to 0?59 (folate) for other nutrients (energy, carbohydrate, protein, fat, Ca and vitamin E). Spearman correlation coefficients between the recalls and FFQ for food groups ranged from 0?18 (dark green leafy and yellow vegetables) to 0?58 (poultry). Reproducibility correlation coefficients (energy-adjusted) varied between 0?39 for retinol and 0?66 for vitamin E, with most values falling between 0?50 and 0?60. Conclusions: The FFQ had good relative validity for estimating habitual food group and nutrient intakes, but was poor for some micronutrients (Fe, retinol and b-carotene) and foods (fruits and dark green leafy vegetables). Keywords Quantitative FFQ Adults Validity BotswanaBotswana has undergone a rapid epidemiological transition characterized by increased incidences of non-communicable diseases, namely CVD, diabetes and cancers (1) . Dietary intake is associated with morbidity and mortality from non-communicable diseases (2) . Assessment of the usual food intake of individuals and groups is central to the investigation of eating patterns, nutrient intakes and their relationship to health outcomes, but the measurement of food and nutrient intakes can be challenging. The FFQ is used to obtain estimates of habitual diet and in contrast to other methods, such as single 24 h recalls and food records which do not reflect past diet or usual intake, has been used in a variety of settings to measure intakes in epidemiological studies. The FFQ ranks individuals according to levels of consumption rather than providing estimates of absolute quantities of energy and nutrient intakes. In addition, the technique has the advantage of being relatively easy to administer and analyse, thereby incurring lower costs compared with other methods of dietary assessment (3) . The use and limitations of the FFQ have been extensively reviewed and the method can be prone to measurement errors; thus validation studies are an essential step in the development of new FFQ.Whereas FFQ have been developed and validated for many developed and developing economies, there are few published reports of validated instruments designed to mea...

“…The accurate assessment of nutritional intake is important in epidemiological studies. Although under-reporting of energy intake in young people has been shown (7) , the FFQ is feasible for this purpose (8) , considering the circumstances of young people that prohibit them from weighing foods, such as school attendance, as well as their ability to meticulously record food intake.Thus far, various FFQ have been assessed to determine their validity for use in young people in Western countries (9)(10)(11)(12)(13)(14)(15)(16) . To our knowledge, however, no study has determined the effectiveness of an FFQ in acquiring information on the diets of young people in Japan.…”

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confidence: 99%

“…Thus far, various FFQ have been assessed to determine their validity for use in young people in Western countries (9)(10)(11)(12)(13)(14)(15)(16) . To our knowledge, however, no study has determined the effectiveness of an FFQ in acquiring information on the diets of young people in Japan.…”

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confidence: 99%

Validity and reproducibility of the FFQ (FFQW82) for dietary assessment in female adolescents

Watanabe

Yamaoka

Yokotsuka

et al. 2010

Objective: To assess the validity and reproducibility of a self-administered FFQ with eighty-two food items (FFQW82) for assessing the habitual diet in female adolescents. Design: The validity of the FFQW82 for assessment of nutrient intake was evaluated by comparison with a 7 d weighed food record (7d-FRRI) reported as 'gold standard'. Reproducibility of the FFQW82 was assessed at an interval of 1 month (test-retest method). The first survey (FFQW82 and 7d-FRRI) was conducted in April 2007 and the second FFQW82 survey was conducted in May 2007. Daily consumption of energy from eleven food groups and nine nutrients were calculated from both instruments for breakfast, lunch, dinner and the whole day. Crude and energyadjusted Pearson correlation coefficients were calculated using log-transformed data. Setting: Middle school, Tokyo, Japan. Subjects: Female adolescents aged 12-13 years. Results: Sixty-three female adolescents completed both surveys. The relative difference between the energy intake calculated by the FFQW82 and the 7d-FRRI for the whole day, breakfast, lunch and dinner was 8 %, 10 %, 15 % and 10 %, respectively. As for validity, the correlation coefficient of total energy intake for the whole day was 0?31. The result for breakfast was relatively higher (0?59) compared with that for lunch (0?40) and dinner (0?32). For macronutrients, the energy-adjusted correlation coefficient ranged from 0?28 (carbohydrates) to 0?53 (protein). Reproducibility of total energy intake was 0?62 and ranged from 0?46 (fat) to 0?69 (carbohydrate) for macronutrients. Conclusions: These results suggest that the FFQW82 has proved to have some potential with regard to reproducibility among our study population. Keywords FFQ Validity Reproducibility Female adolescents Nutrition assessmentIn recent years, youth obesity (1,2) and lifestyle-related diseases (3)(4)(5) have increased significantly, as have problems related to a distorted body image (6) . The accurate assessment of nutritional intake is important in epidemiological studies. Although under-reporting of energy intake in young people has been shown (7) , the FFQ is feasible for this purpose (8) , considering the circumstances of young people that prohibit them from weighing foods, such as school attendance, as well as their ability to meticulously record food intake.Thus far, various FFQ have been assessed to determine their validity for use in young people in Western countries (9)(10)(11)(12)(13)(14)(15)(16) . To our knowledge, however, no study has determined the effectiveness of an FFQ in acquiring information on the diets of young people in Japan. Previously, we developed an FFQ with sixty-five food items (FFQW65) to be used in nutritional education for the prevention of diabetes (17) . This instrument assessed energy intake separately for breakfast, lunch and dinner in addition to intake for the entire day and was useful for nutritional education in adults. We reported on the assessment of the effect of nutritional education in a randomized controlled trial ...