Objective The primary objective of this study was to examine the validity and reliability of a semi-quantitative food frequency questionnaire(FFQ) among Chinese children aged 12-17 years. Methods A semi-quantitative 7...Objective The primary objective of this study was to examine the validity and reliability of a semi-quantitative food frequency questionnaire(FFQ) among Chinese children aged 12-17 years. Methods A semi-quantitative 72-food item FFQ was developed for children aged 12-17 years. The reliability and validity of this FFQ were evaluated against 24-h dietary recalls(24 h DRs) to measure the consumption of foods and nutrients. We administered two FFQs and three DRs to children(N = 160) over a period of 1 month to evaluate the reliability and validity. Reliability was examined by quartile agreement and intraclass correlation coefficients(ICCs), and validity was examined by quartile agreement, Bland-Altman plots and correlation with DRs. Results For reliability, the ICCs between the two FFQs ranged from 0.21 to 0.76 for foods and nutrients, and the quartile agreement ranged from 70.0% to 95.0% in the same or adjacent quartiles. Spearman’s correlation coefficients of foods and nutrients between the second FFQ and the 24 h DRs ranged from-0.04 to 0.59. The Bland-Altman plots demonstrated good agreement across the range of intakes among nutrients. The quartile agreement ranged from 50.0% to 100.0%, with infrequent misclassification. Conclusion The FFQ assessment of dietary intakes demonstrated acceptable relative validity and high reproducibility for Chinese children aged 12-17 years.展开更多
Objectives This study was design to develop a semi-quantitative Chinese Food Frequency Questionnaire （FFQ） and to conduct a validation study for the questionnaire. Methods Based on the survey experience in recent ye...Objectives This study was design to develop a semi-quantitative Chinese Food Frequency Questionnaire （FFQ） and to conduct a validation study for the questionnaire. Methods Based on the survey experience in recent years, a new Chinese food frequency questionnaire （FFQ） with 149 items in 17 food categories was developed. A validation study on this new FFQ was conducted in Jiangsu and Beijing of China between 1999 and 2001. The period of study covered 1 year and the FFQ was validated by comparing with data obtained by a six repeated 24-hour recalls for 3 consecutive days, or a totally 18-day 24- hour recall throughout the year. A total of 271 healthy adult subjects were enrolled in the study. Food and nutrient intakes measured by the 18-day dietary recalls and food frequency questionnaires （FFQs） were computed in the National Institute for Nutrition and Food Safety, China CDC using the existing nutrition database. The average daily intake of foods and nutrients over the 18-day recall was used to compare with FFQ1 and FFQ2, which was conducted at the beginning and the end of the year, respectively. All statistical analyses were carried out using SAS software version 6.12.展开更多
Stipulating maximum level of food additives in food should be conducted to anticipate excessive usage, guarantee food safety, and as reference in food inspection. However, to support adequate stipulating, information ...Stipulating maximum level of food additives in food should be conducted to anticipate excessive usage, guarantee food safety, and as reference in food inspection. However, to support adequate stipulating, information about food aditives exposure assessment must available. In fact, this information is stills very few in Indonesia. Tartrazine is one of food additives that most frequently used in food product. The objective of this research was to conduct the exposure assessment of tartrazine from food products which have enlisted in National Agency for Drug and Food Control (NADFC) of Indonesia by using food frequency method with respondent from North Jakarta. The steps of research were survey preparation, food consumption survey from 150 respondents representing groups of children, adolescents, and adults, data processing, and data analysis. The result showed that mean value of food consumption containing tartrazine by all respondents was 306.38 g/person/day. The highest mean of consumption in total population groups was by children due to higher food consumption frequency and portion. The five highest food containing tartrazine which were consumed by all respondents were instant noodles, powder concentrate for beverages, non-carbonated beverages, carbonated beverages, and biscuits. All exposure assessment in this research did not exceed the Acceptable Daily Intake (ADI) for tartrazine. The mean value of exposure by all respondents was 231.24 μg/kg BW (3.08% ADI). The highest mean value of exposure in total population groups was by children due to their higher food consumption and lower body weight. The major contributing foods to tartrazine exposure were instant noodles, non-carbonated beverages, powder concentrate for beverages, biscuits, and snacks. Instant noodles had the highest mean value of consumption and tartrazine exposure for all respondents in North Jakarta. Respondent which had the highest mean value of consumption and tartrazine exposure was by children. Snacks were relative low consumed but high tartrazine exposure.展开更多
Objective: The objective of this study was to examine the reproducibility and validity of a Food Frequency Questionnaire (FFQ) and assess calcium and vitamin D intake in health female college students. Methods: Thirty...Objective: The objective of this study was to examine the reproducibility and validity of a Food Frequency Questionnaire (FFQ) and assess calcium and vitamin D intake in health female college students. Methods: Thirty-five healthy female students were conveniently selected to participate in the study. None of the subjects were taking any supplements. The FFQ was validated against intakes from a three-day diet food record report (FR). Results: Positive correlations were observed of daily vitamin D (r = 0.82, p –8, 9, p < 0.676 and 43 mg/d (95% CI: 20, 65, p < 0.01). Conclusions: The FFQ used in this study shows promising validation evidence to be used in the future for assessing vitamin D and calcium intakes in female students.展开更多
Nutrition data for older adults is an area that has few studies mainly in Brazil. Due to the importance to know the behavior of this age group, the aim of this study was to develop and validate a frequency food questi...Nutrition data for older adults is an area that has few studies mainly in Brazil. Due to the importance to know the behavior of this age group, the aim of this study was to develop and validate a frequency food questionnaire （FFQ） for older people in Brazil. It was considered a sample of 73 subjects from the city of Avar6, Sao Paulo, Brazil, and it was applied three 24-hour recalls and a FFQ developed for adults. Data from the three 24-hour recalls were transformed in nutrient intake as well as the data from FFQ. Statistical analysis was performed in order to get correlations between data from the mean of three 24-hour recalls and FFQ for some nutrients. It was found high correlations among them, concluding that the FFQ is valid to get nutrient intakes for older people.展开更多
Purpose: To determine how adults and registered dietitians (RDs) perceived foods according to a frequency continuum, and to assess the differences between them. Methods: A sample of 1002 adults and 566 RDs were recrui...Purpose: To determine how adults and registered dietitians (RDs) perceived foods according to a frequency continuum, and to assess the differences between them. Methods: A sample of 1002 adults and 566 RDs were recruited. Participants had to associate 51 foods with a frequency continuum (“daily”, “occasional” or “sometimes”). Food groups were created: 1) Canada’s Food Guide’s groups (CFG) (n = 22), 2) High in Fat or High in Sugar foods (HFHS) (n = 16), and 3) Meals (n = 13). Results: CFG were perceived as “daily” foods (adults = 56.8%, RDs = 94.5%), HFHS as “sometimes” foods (adults = 67.2%, RDs = 59.6%) and Meals as “occasional” foods (adults = 75.8%, RDs = 58.2%). Adults (all age groups) perceived that CFG and Meals should be eaten less frequently than RDs (18 to 64 years old). Younger adults perceived these two groups as to be eaten more frequently than older respondents. Adults perceived HFHS as to be consumed less frequently than RDs (no age effect). Conclusions: While adults tend to have more severe perceptions than RDs, results show that their food perceptions are in line with an overall awareness of Canadian nutrition guidelines, suggesting the presence of a relevant popular knowledge about the value of food.展开更多
基金provided by the Science&Technology Basic Resources Investigation Program of China [grant number:2017FY101101 and 2017FY101103]
文摘Objective The primary objective of this study was to examine the validity and reliability of a semi-quantitative food frequency questionnaire(FFQ) among Chinese children aged 12-17 years. Methods A semi-quantitative 72-food item FFQ was developed for children aged 12-17 years. The reliability and validity of this FFQ were evaluated against 24-h dietary recalls(24 h DRs) to measure the consumption of foods and nutrients. We administered two FFQs and three DRs to children(N = 160) over a period of 1 month to evaluate the reliability and validity. Reliability was examined by quartile agreement and intraclass correlation coefficients(ICCs), and validity was examined by quartile agreement, Bland-Altman plots and correlation with DRs. Results For reliability, the ICCs between the two FFQs ranged from 0.21 to 0.76 for foods and nutrients, and the quartile agreement ranged from 70.0% to 95.0% in the same or adjacent quartiles. Spearman’s correlation coefficients of foods and nutrients between the second FFQ and the 24 h DRs ranged from-0.04 to 0.59. The Bland-Altman plots demonstrated good agreement across the range of intakes among nutrients. The quartile agreement ranged from 50.0% to 100.0%, with infrequent misclassification. Conclusion The FFQ assessment of dietary intakes demonstrated acceptable relative validity and high reproducibility for Chinese children aged 12-17 years.
基金the funding from the National Institute for Cancer Research,NIH,USA,and the National Institute for Nutrition and Food Safety,Chinese Center for Disease Control and Prevention
文摘Objectives This study was design to develop a semi-quantitative Chinese Food Frequency Questionnaire （FFQ） and to conduct a validation study for the questionnaire. Methods Based on the survey experience in recent years, a new Chinese food frequency questionnaire （FFQ） with 149 items in 17 food categories was developed. A validation study on this new FFQ was conducted in Jiangsu and Beijing of China between 1999 and 2001. The period of study covered 1 year and the FFQ was validated by comparing with data obtained by a six repeated 24-hour recalls for 3 consecutive days, or a totally 18-day 24- hour recall throughout the year. A total of 271 healthy adult subjects were enrolled in the study. Food and nutrient intakes measured by the 18-day dietary recalls and food frequency questionnaires （FFQs） were computed in the National Institute for Nutrition and Food Safety, China CDC using the existing nutrition database. The average daily intake of foods and nutrients over the 18-day recall was used to compare with FFQ1 and FFQ2, which was conducted at the beginning and the end of the year, respectively. All statistical analyses were carried out using SAS software version 6.12.
文摘Stipulating maximum level of food additives in food should be conducted to anticipate excessive usage, guarantee food safety, and as reference in food inspection. However, to support adequate stipulating, information about food aditives exposure assessment must available. In fact, this information is stills very few in Indonesia. Tartrazine is one of food additives that most frequently used in food product. The objective of this research was to conduct the exposure assessment of tartrazine from food products which have enlisted in National Agency for Drug and Food Control (NADFC) of Indonesia by using food frequency method with respondent from North Jakarta. The steps of research were survey preparation, food consumption survey from 150 respondents representing groups of children, adolescents, and adults, data processing, and data analysis. The result showed that mean value of food consumption containing tartrazine by all respondents was 306.38 g/person/day. The highest mean of consumption in total population groups was by children due to higher food consumption frequency and portion. The five highest food containing tartrazine which were consumed by all respondents were instant noodles, powder concentrate for beverages, non-carbonated beverages, carbonated beverages, and biscuits. All exposure assessment in this research did not exceed the Acceptable Daily Intake (ADI) for tartrazine. The mean value of exposure by all respondents was 231.24 μg/kg BW (3.08% ADI). The highest mean value of exposure in total population groups was by children due to their higher food consumption and lower body weight. The major contributing foods to tartrazine exposure were instant noodles, non-carbonated beverages, powder concentrate for beverages, biscuits, and snacks. Instant noodles had the highest mean value of consumption and tartrazine exposure for all respondents in North Jakarta. Respondent which had the highest mean value of consumption and tartrazine exposure was by children. Snacks were relative low consumed but high tartrazine exposure.
文摘Objective: The objective of this study was to examine the reproducibility and validity of a Food Frequency Questionnaire (FFQ) and assess calcium and vitamin D intake in health female college students. Methods: Thirty-five healthy female students were conveniently selected to participate in the study. None of the subjects were taking any supplements. The FFQ was validated against intakes from a three-day diet food record report (FR). Results: Positive correlations were observed of daily vitamin D (r = 0.82, p –8, 9, p < 0.676 and 43 mg/d (95% CI: 20, 65, p < 0.01). Conclusions: The FFQ used in this study shows promising validation evidence to be used in the future for assessing vitamin D and calcium intakes in female students.
文摘Nutrition data for older adults is an area that has few studies mainly in Brazil. Due to the importance to know the behavior of this age group, the aim of this study was to develop and validate a frequency food questionnaire （FFQ） for older people in Brazil. It was considered a sample of 73 subjects from the city of Avar6, Sao Paulo, Brazil, and it was applied three 24-hour recalls and a FFQ developed for adults. Data from the three 24-hour recalls were transformed in nutrient intake as well as the data from FFQ. Statistical analysis was performed in order to get correlations between data from the mean of three 24-hour recalls and FFQ for some nutrients. It was found high correlations among them, concluding that the FFQ is valid to get nutrient intakes for older people.
文摘Purpose: To determine how adults and registered dietitians (RDs) perceived foods according to a frequency continuum, and to assess the differences between them. Methods: A sample of 1002 adults and 566 RDs were recruited. Participants had to associate 51 foods with a frequency continuum (“daily”, “occasional” or “sometimes”). Food groups were created: 1) Canada’s Food Guide’s groups (CFG) (n = 22), 2) High in Fat or High in Sugar foods (HFHS) (n = 16), and 3) Meals (n = 13). Results: CFG were perceived as “daily” foods (adults = 56.8%, RDs = 94.5%), HFHS as “sometimes” foods (adults = 67.2%, RDs = 59.6%) and Meals as “occasional” foods (adults = 75.8%, RDs = 58.2%). Adults (all age groups) perceived that CFG and Meals should be eaten less frequently than RDs (18 to 64 years old). Younger adults perceived these two groups as to be eaten more frequently than older respondents. Adults perceived HFHS as to be consumed less frequently than RDs (no age effect). Conclusions: While adults tend to have more severe perceptions than RDs, results show that their food perceptions are in line with an overall awareness of Canadian nutrition guidelines, suggesting the presence of a relevant popular knowledge about the value of food.
