Development and validation of two food portion photograph books to assess dietary intake among adults and children in Central Africa (original) (raw)
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Validity of photographs for food portion estimation in a rural West African setting
Public Health Nutrition, 2008
Objective: To validate food photographs for food portion size estimation of frequently consumed dishes, to be used in a 24-hour recall food consumption study of pregnant women in a rural environment in Burkina Faso. This food intake study is part of an intervention evaluating the efficacy of prenatal micronutrient supplementation on birth outcomes. Subjects: Women of childbearing age (15-45 years). Design: A food photograph album containing four photographs of food portions per food item was compiled for eight selected food items. Subjects were presented two food items each in the morning and two in the afternoon. These foods were weighed to the exact weight of a food depicted in one of the photographs and were in the same receptacles. The next day another fieldworker presented the food photographs to the subjects to test their ability to choose the correct photograph. Results: The correct photograph out of the four proposed was chosen in 55% of 1028 estimations. For each food, proportions of underestimating and overestimating participants were balanced, except for rice and couscous. On a group level, mean differences between served and estimated portion sizes were between 28.4% and 6.3%. Subjects who attended school were almost twice as likely to choose the correct photograph. The portion size served (small vs. largest sizes) had a significant influence on the portion estimation ability. Conclusions: The results from this study indicate that in a West African rural setting, food photographs can be a valuable tool for the quantification of food portion size on group level.
Food photographs in portion size estimation among adolescent Mozambican girls
Public Health Nutrition, 2013
Objective: To assess the validity of food photographs in portion size estimation among adolescent girls in Mozambique. The study was carried out in preparation for the larger ZANE study, which used the 24 h dietary recall method. Design: Life-sized photographs of three portion sizes of two staple foods and three sauces were produced. Participants ate weighed portions of one staple food and one sauce. After the meal, they were asked to estimate the amount of food with the aid of the food photographs. Setting: Zambezia Province, Mozambique. Subjects: Ninety-nine girls aged 13-18 years. Results: The mean differences between estimated and actual portion sizes relative to the actual portion size ranged from 219 % to 8 % for different foods. The respective mean difference for all foods combined was 25 % (95 % CI 212, 2 %). Especially larger portions of the staple foods were often underestimated. For the staple foods, between 62 % and 64 % of the participants were classified into the same thirds of the distribution of estimated and actual food consumption and for sauces, the percentages ranged from 38 % to 63 %. Bland-Altman plots showed wide limits of agreement. Conclusions: Using life-sized food photographs among adolescent Mozambican girls resulted in a rather large variation in the accuracy of individuals' estimates. The ability to rank individuals according to their consumption was, however, satisfactory for most foods. There seems to be a need to further develop and test food photographs used in different populations in Sub-Saharan Africa to improve the accuracy of portion size estimates.
Nutrition Journal, 2012
Background: Improvement of traditional methods for dietary assessment is necessary, especially in rural areas where it is more difficult to succeed with self-reporting methods. This study presents and validates a method for improving accuracy when measuring food and nutrient intake of individuals in rural areas. It is called the "Food photography 24-h recall method" (FP 24-hR) and is a modified 24-h recall with the addition of a digital food photography record and a photo atlas. Methods: The study was carried out in a rural area in the tropical region of Bolivia; 45 women participated. Validation of the method was made by comparing it with a reference method, the Weighed Food Record (WFR). During the FP 24-hR, digital photographs were taken by the subjects of all food consumed during a day and a 24-h recall questionnaire was conducted by an interviewer. An estimate of the amount of food consumed was made using a photo atlas and the photographs taken by the subjects. For validation, comparison was made between the calculations, by both methods, of the levels of food, and nutrient, intake.
European Journal of Nutrition & Food Safety, 2015
Objectives: Reliance on respondents’ individual recall ability for accurate dietary data collection is always a challenge. We developed a photo atlas to aid respondents in recall of foods eaten during the interactive 24 hr recall multiple pass approach for data collection during the Kenya National Micronutrient Survey 2011. Photographs of foods are preferred for estimating portion sizes because the amount eaten is easier for the respondent to visualize. However, it was necessary to validate the photo atlas before using it. Methods: Seven common Kenyan food items were chosen for validation of the atlas: cassava root, tomatoes, eggplant, raw chicken wings and legs, watermelon and fried dough. Each color photo displayed three differently sizes of each food item to capture “large,” “medium,” and “small”. Actual food portions were used for comparison with the photos. Volunteers were asked to rate the level of similarity between the actual-life food item and the item in the photograph on ...
PloS one, 2018
Although, United Arab Emirates (UAE) has one of the highest prevalence of overweight, obesity and type 2 diabetes in the world, however, validated dietary assessment aids to estimate food intake of individuals and populations in the UAE are currently lacking. We conducted two observational studies to evaluate the accuracy of a photographic food atlas which was developed as a tool for food portion size estimation in the UAE. The UAE Food Atlas presents eight portion sizes for each food. Study 1 involved portion size estimations of 13 food items consumed during the previous day. Study 2 involved portion size estimations of nine food items immediately after consumption. Differences between the food portion sizes estimated from the photographs and the weighed food portions (estimation error), as well as the percentage differences relative to the weighed food portion for each tested food item were calculated. Four of the evaluated food items were underestimated (by -8.9% to -18.4%), whil...
Validation of photograph series as a portion size measurement aid in dietary assessment in children
Paediatria Croatica
Determining children' s food consumption is challenging and requires dietetic methods that provide adequate specificity for describing, but also for quantifying food intake. To help survey respondents indicate food portion sizes, photograph series can be used, but these must be validated in a nationally representative sample of the population. The aim of the present study was to validate photograph series as a portion size measurement aid during dietary assessment of children in Croatia. This study involved 28 mothers of children aged 3 months to 10 years, who were asked to select one of four photographs in a series that best represented the quantity of food served to them. Of the 21 series tested, 17 were found to be appropriate for assessing food portion sizes. Participants were worst at assessing portion sizes of banana (29.3%), porridge (22.8%), hot dogs (20,3%) and plain yoghurt (19.1%). Further studies are needed to determine why these foods are poorly recognized so that photographs can be modified accordingly and validated.
Validation of a picture book to be used in a pan-European dietary survey
Public health nutrition, 2018
To validate a picture book for estimation of food portion sizes using two approaches: (i) 'perception' of food portions by comparison with a series of food photos; and (ii) 'conceptualization and memory', using the same photos to estimate the amount of served food one hour after self-served food portions. Each partner developed a country-specific picture book based on the so-called EPIC-Soft picture book. Representative and common photo series were chosen achieving approximately 25 % of the original picture book (n 23). Three portions from each photo series were randomly selected. The study was performed within the Pilot study in the view of a Pan-European dietary survey - Adolescents, adults and elderly (PILOT-PANEU) project. A sample of adolescents and adults was recruited in five countries: Bulgaria (n 103), Finland (n 34), Germany (n 69), Hungary (n 62) and Portugal (n 77). Among the portions of the corresponding photo series and depending on the type of food, fr...
2015
The aim of the present study was to develop life-sized food photographs as a tool for dietary intake assessment. This was an experimental study and used weighed record method to measure the dietary intake of subjects and a one-day 24-hour recall method was used to compare with the weighed record method. A total of fifteen subjects of Universiti Putra Malaysia staff with monthly household income below than MYR2300 (low income) were selected. From a hundred and sixteen food items were photographed, eleven of them were chosen for validation. A paired samples t-test showed that the percent weight differences between weighed record and 24-hour recall methods was between -10.7 to 5.3%, and foods that had definitive shape and form couldn't be estimated by the subjects. A correlation analyses between the two methods shows that there was a significant correlation (p<0.01) between these two methods. Nutrient intake analyses show that macronutrient intakes differed between 8.1 to 11%, w...
Public Health Nutrition, 2019
Objective: To validate digitally displayed photographic portion-size estimation aids (PSEA) against a weighed meal record and compare findings with an atlas of printed photographic PSEA and actual prepared-food PSEA in a low-income country. Design: Participants served themselves water and five prepared foods, which were weighed separately before the meal and again after the meal to measure any leftovers. Participants returned the following day and completed a meal recall. They estimated the quantities of foods consumed three times using the different PSEA in a randomized order. Setting: Two urban and two rural communities in southern Malawi. Participants: Women (n 300) aged 18-45 years, equally divided by urban/rural residence and years of education (≤4 years and ≥5 years). Results: Responses for digital and printed PSEA were highly correlated (>91 % agreement for all foods, Cohen's κ w = 0•78-0•93). Overall, at the individual level, digital and actual-food PSEA had a similar level of agreement with the weighed meal record. At the group level, the proportion of participants who estimated within 20 % of the weighed grams of food consumed ranged by type of food from 30 to 45 % for digital PSEA and 40-56 % for actual-food PSEA. Digital PSEA consistently underestimated grams and nutrients across foods, whereas actual-food PSEA provided a mix of under-and overestimates that balanced each other to produce accurate mean energy and nutrient intake estimates. Results did not differ by urban and rural location or participant education level. Conclusions: Digital PSEA require further testing in low-income settings to improve accuracy of estimations.