Iodine is an essential element for the synthesis of thyroid hormones.Iodine deficiency increases the burden on thyroid function and causes harm to health.The identification of convenient and reliable biomarkers for as...Iodine is an essential element for the synthesis of thyroid hormones.Iodine deficiency increases the burden on thyroid function and causes harm to health.The identification of convenient and reliable biomarkers for assessing iodine nutritional status is essential for evaluating iodine intake.Urinary iodine concentration(UIC)is commonly used for population level iodine status assessment but is less reliable for individuals.A 24-h urine sample is more accurate but difficult to collect[1].Thyroid volume(Tvol)and goiter rate are suitable for evaluating the long-term iodine nutritional status in populations[2].Blood indicator collection is an invasive procedure.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
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
Background and Objectives:To establish a new method for developing an efficient and region-specific semi-quantitative food frequency questionnaire(SQFFQ),and to make it a simple,effective and widely applicable measure...Background and Objectives:To establish a new method for developing an efficient and region-specific semi-quantitative food frequency questionnaire(SQFFQ),and to make it a simple,effective and widely applicable measurement tool,this study takes Xi'an City,Shaanxi Province as a case study.Methods and Study Design:For 129 common food items,an initial food frequency questionnaire(FFQ)and a 24-hour dietary recall survey(24hDR)are constructed,and a variety of methods are combined to improve the convenience and credibility of the questionnaire itself in the inspection process,and the reliability and validity test are carried out.Results:A total of 367 questionnaires are collected in study,including FFQ and 24hDR at various correction stages,in a three-month interval,and finally a semi-quantitative food frequency questionnaire containing 104 food items is obtained.The Pearson correlation coefficient of SQFFQ1 and SQFFQ2 ranges from 0.60-0.75,and the Spearman and Kendall correlation coefficients range from 0.50-0.89,and the correlation coefficient increases slightly after logarithmic transformation by logarithmic transformation,and the CCC correlation coefficient increases to 0.5-0.95.On average,more than 80%of subjects are classified as identical or adjacent tertiles per SQFFQ result.The Pearson,Spearman,Kendall,CCC correlation coefficients between 24hDR and SQFFQ2 range from 0.50-0.90,and on average more than 75%of participants are in the same or adjacent energy and nutrient tertiles in SQFFQ2 versus 24hDR results.Conclusions:The semi-quantitative food frequency questionnaire for dietary pattern sur veys in Xi'an,Shaanxi can effectively assess nutrient intake in dietary nutrient correlation studies.展开更多
Background and Objectives:Epidemiological studies often use the food frequency questionnaire(FFQ)to predict the food consumption habits of a target group and subsequently promote healthy eating in the group.In the pre...Background and Objectives:Epidemiological studies often use the food frequency questionnaire(FFQ)to predict the food consumption habits of a target group and subsequently promote healthy eating in the group.In the present study,a version of the FFQ for Malaysian young adults aged 18–24 years was designed and validated.Methods and Study Design:This study comprised development and validation phases.In the development phase,129 young adults from a public university in Klang Valley completed a 3-day food record(3DFR),and the data were used to create a food list for the FFQ.Two weeks later,in the validation phase,another 100 participants recruited from the same university completed the 3DFR and a newly developed FFQ for assessing consumption of 38 food items.Finally,the data obtained from the FFQ and 3DFR were used to analyze the nutrient intake of each participant,and the developed FFQ was validated using Spearman correlation coefficients(r)and Bland–Altman methods.Results:For the development phase,38 food items were determined to contribute to 90%of the participants’total energy and macronutrient intake,and these items were included on the FFQ.For the validation phase,the average Spearman correlation coefficient for energy and all nutrients was 0.43,which indicated good agreement between the 3DFR and FFQ.Cross-classification analysis of the 3DFR and FFQ results revealed that 79%of the young adults were classified into similar or neighboring quartiles when each set of results was used.The Bland–Altman plots revealed that the results obtained using the two methods were parallel.Conclusions:The FFQ is a simple and validated tool that can be self-administered to young adults to assess their energy and nutrient consumption.展开更多
Background and Objectives:Repeating food frequency questionnaires(FFQs)within the same population was reported to improve the validity of correlation coefficient(CC).However,the enhancement of validity in ranking agre...Background and Objectives:Repeating food frequency questionnaires(FFQs)within the same population was reported to improve the validity of correlation coefficient(CC).However,the enhancement of validity in ranking agreement remains underreported.Herein,we assessed the validity of energy and nutrient intake estimates using single and multiple FFQs and their ability to rank individuals.Methods and Study Design:213 men and women aged≥20 years were recruited from the residents participating in the Tohoku Medical Megabank Project(TMM)cohort studies;three FFQs were conducted in November each year from 2019 to 2021,with 12-day weighted food records(WFRs)as the reference method.Spearman’s rank CCs were calculated between single or multiple FFQs estimates and those obtained through the 12-day WFR.Additionally,the ranking agreement was compared based on cross-classification.Results:CCs between intake estimated using a single FFQ and 12-day WFR were moderate for several nutrients,with median CCs of 0.52 for men and 0.48 for women.CCs for multiple FFQs were slightly higher than that of single FFQ,with median CCs of 0.59 for men and 0.56 for women.Regardless of the number of FFQs,the proportion of subjects classified into the opposite extreme category was≤5%for most nutrients.Conclusions:A single FFQ used for adults in the TMM cohort studies showed moderate validity.Estimates from multiple FFQs improved the accuracy slightly;nevertheless,this indicates that relying on a single FFQ is unlikely to result in a serious misclassification compared to using intake data from multiple FFQs over a relatively short period.展开更多
基金supported by the National Natural Science Foundation of China(Grant numbers 82204041)Gansu Provincial Science and Technology Program Funded Projects(Grant numbers 22JR11RA184).
文摘Iodine is an essential element for the synthesis of thyroid hormones.Iodine deficiency increases the burden on thyroid function and causes harm to health.The identification of convenient and reliable biomarkers for assessing iodine nutritional status is essential for evaluating iodine intake.Urinary iodine concentration(UIC)is commonly used for population level iodine status assessment but is less reliable for individuals.A 24-h urine sample is more accurate but difficult to collect[1].Thyroid volume(Tvol)and goiter rate are suitable for evaluating the long-term iodine nutritional status in populations[2].Blood indicator collection is an invasive procedure.
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.
基金supported by the Special scientific research project for health care of the whole army(Vol.20BJZ12).
文摘Background and Objectives:To establish a new method for developing an efficient and region-specific semi-quantitative food frequency questionnaire(SQFFQ),and to make it a simple,effective and widely applicable measurement tool,this study takes Xi'an City,Shaanxi Province as a case study.Methods and Study Design:For 129 common food items,an initial food frequency questionnaire(FFQ)and a 24-hour dietary recall survey(24hDR)are constructed,and a variety of methods are combined to improve the convenience and credibility of the questionnaire itself in the inspection process,and the reliability and validity test are carried out.Results:A total of 367 questionnaires are collected in study,including FFQ and 24hDR at various correction stages,in a three-month interval,and finally a semi-quantitative food frequency questionnaire containing 104 food items is obtained.The Pearson correlation coefficient of SQFFQ1 and SQFFQ2 ranges from 0.60-0.75,and the Spearman and Kendall correlation coefficients range from 0.50-0.89,and the correlation coefficient increases slightly after logarithmic transformation by logarithmic transformation,and the CCC correlation coefficient increases to 0.5-0.95.On average,more than 80%of subjects are classified as identical or adjacent tertiles per SQFFQ result.The Pearson,Spearman,Kendall,CCC correlation coefficients between 24hDR and SQFFQ2 range from 0.50-0.90,and on average more than 75%of participants are in the same or adjacent energy and nutrient tertiles in SQFFQ2 versus 24hDR results.Conclusions:The semi-quantitative food frequency questionnaire for dietary pattern sur veys in Xi'an,Shaanxi can effectively assess nutrient intake in dietary nutrient correlation studies.
文摘Background and Objectives:Epidemiological studies often use the food frequency questionnaire(FFQ)to predict the food consumption habits of a target group and subsequently promote healthy eating in the group.In the present study,a version of the FFQ for Malaysian young adults aged 18–24 years was designed and validated.Methods and Study Design:This study comprised development and validation phases.In the development phase,129 young adults from a public university in Klang Valley completed a 3-day food record(3DFR),and the data were used to create a food list for the FFQ.Two weeks later,in the validation phase,another 100 participants recruited from the same university completed the 3DFR and a newly developed FFQ for assessing consumption of 38 food items.Finally,the data obtained from the FFQ and 3DFR were used to analyze the nutrient intake of each participant,and the developed FFQ was validated using Spearman correlation coefficients(r)and Bland–Altman methods.Results:For the development phase,38 food items were determined to contribute to 90%of the participants’total energy and macronutrient intake,and these items were included on the FFQ.For the validation phase,the average Spearman correlation coefficient for energy and all nutrients was 0.43,which indicated good agreement between the 3DFR and FFQ.Cross-classification analysis of the 3DFR and FFQ results revealed that 79%of the young adults were classified into similar or neighboring quartiles when each set of results was used.The Bland–Altman plots revealed that the results obtained using the two methods were parallel.Conclusions:The FFQ is a simple and validated tool that can be self-administered to young adults to assess their energy and nutrient consumption.
基金supported by grants from the Japan Agency for Medical Research and Development(AMED)(grant numbers,JP17km0105001 and JP21tm0124005)supported by KAGOME CO.,LTD.and KAGOME CO.,LTDsupport in the form of salaries for authors YY,TY,and SS.
文摘Background and Objectives:Repeating food frequency questionnaires(FFQs)within the same population was reported to improve the validity of correlation coefficient(CC).However,the enhancement of validity in ranking agreement remains underreported.Herein,we assessed the validity of energy and nutrient intake estimates using single and multiple FFQs and their ability to rank individuals.Methods and Study Design:213 men and women aged≥20 years were recruited from the residents participating in the Tohoku Medical Megabank Project(TMM)cohort studies;three FFQs were conducted in November each year from 2019 to 2021,with 12-day weighted food records(WFRs)as the reference method.Spearman’s rank CCs were calculated between single or multiple FFQs estimates and those obtained through the 12-day WFR.Additionally,the ranking agreement was compared based on cross-classification.Results:CCs between intake estimated using a single FFQ and 12-day WFR were moderate for several nutrients,with median CCs of 0.52 for men and 0.48 for women.CCs for multiple FFQs were slightly higher than that of single FFQ,with median CCs of 0.59 for men and 0.56 for women.Regardless of the number of FFQs,the proportion of subjects classified into the opposite extreme category was≤5%for most nutrients.Conclusions:A single FFQ used for adults in the TMM cohort studies showed moderate validity.Estimates from multiple FFQs improved the accuracy slightly;nevertheless,this indicates that relying on a single FFQ is unlikely to result in a serious misclassification compared to using intake data from multiple FFQs over a relatively short period.
