Validation of digital photographs, as a tool in 24-h recall, for the improvement of dietary assessment among rural populations in developing countries
(2012) In Nutrition Journal 11.- Abstract
- 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... (More) - 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.
Results
The comparison was made in 10 food categories; most of which were
somewhat underestimated from −2.3% (cassava) to −6.8% (rice), except for
beverages (+1.6%) and leafy vegetables (+8.7%), which were
overestimated. Spearman’s correlation coefficients were highly
significant (r from 0.75 for eggs to 0.98 for potato and
cassava). Nutrient intakes calculated with data from both methods showed
small differences from -0.90% (vitamin C) to -5.98% (fat). Although all
nutrients were somewhat underestimated, Pearson′s
coefficients are high (>0.93 for all) and statistically significant.
Bland Altman analysis showed that differences between both methods were
random and did not exhibit any systematic bias over levels of food and
nutrient intake, with acceptable 95% limits of agreement.
Conclusion
The FP 24-hR exhibits acceptable differences when compared with a WFR,
digital photos are useful as a memory aid for the subjects during 24-h
recall and as an estimation tool. The method is suitable for assessing
dietary intake among rural populations in developing countries. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3053935
- author
- Lazarte, Claudia E LU ; Encinas, Ma Eugenia ; Alegre, Claudia and Granfeldt, Yvonne LU
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- 24-h recall, Developing countries, Digital photographs, Photo atlas, Weighed record
- in
- Nutrition Journal
- volume
- 11
- article number
- 61
- publisher
- BioMed Central (BMC)
- external identifiers
-
- wos:000314520000001
- scopus:84865420032
- pmid:22931128
- ISSN
- 1475-2891
- DOI
- 10.1186/1475-2891-11-61
- language
- English
- LU publication?
- yes
- id
- 0450325a-e8ae-4127-ae58-0c11b62ab215 (old id 3053935)
- date added to LUP
- 2016-04-01 14:24:20
- date last changed
- 2023-11-13 07:04:51
@article{0450325a-e8ae-4127-ae58-0c11b62ab215,
abstract = {{<b>Background</b><br/>Improvement of traditional methods for dietary assessment is necessary, <br>
especially in rural areas where it is more difficult to succeed with <br>
self-reporting methods. This study presents and validates a method for <br>
improving accuracy when measuring food and nutrient intake of <br>
individuals in rural areas. It is called the “Food photography 24-h <br>
recall method” (FP 24-hR) and is a modified 24-h recall with the <br>
addition of a digital food photography record and a photo atlas.<br/> <br/><b>Methods</b><br/> The study was carried out in a rural area in the tropical region of <br>
Bolivia; 45 women participated. Validation of the method was made by <br>
comparing it with a reference method, the Weighed Food Record (WFR). <br>
During the FP 24-hR, digital photographs were taken by the subjects of <br>
all food consumed during a day and a 24-h recall questionnaire was <br>
conducted by an interviewer. An estimate of the amount of food consumed <br>
was made using a photo atlas and the photographs taken by the subjects. <br>
For validation, comparison was made between the calculations, by both <br>
methods, of the levels of food, and nutrient, intake.<br/> <br/><b>Results</b><br/>The comparison was made in 10 food categories; most of which were <br>
somewhat underestimated from −2.3% (cassava) to −6.8% (rice), except for<br>
beverages (+1.6%) and leafy vegetables (+8.7%), which were <br>
overestimated. Spearman’s correlation coefficients were highly <br>
significant (<i>r</i> from 0.75 for eggs to 0.98 for potato and <br>
cassava). Nutrient intakes calculated with data from both methods showed<br>
small differences from -0.90% (vitamin C) to -5.98% (fat). Although all<br>
nutrients were somewhat underestimated, Pearson<sup>′</sup>s <br>
coefficients are high (>0.93 for all) and statistically significant. <br>
Bland Altman analysis showed that differences between both methods were <br>
random and did not exhibit any systematic bias over levels of food and <br>
nutrient intake, with acceptable 95% limits of agreement.<br/> <br/><b>Conclusion</b><br/>The FP 24-hR exhibits acceptable differences when compared with a WFR, <br>
digital photos are useful as a memory aid for the subjects during 24-h <br>
recall and as an estimation tool. The method is suitable for assessing <br>
dietary intake among rural populations in developing countries.}},
author = {{Lazarte, Claudia E and Encinas, Ma Eugenia and Alegre, Claudia and Granfeldt, Yvonne}},
issn = {{1475-2891}},
keywords = {{24-h recall; Developing countries; Digital photographs; Photo atlas; Weighed record}},
language = {{eng}},
publisher = {{BioMed Central (BMC)}},
series = {{Nutrition Journal}},
title = {{Validation of digital photographs, as a tool in 24-h recall, for the improvement of dietary assessment among rural populations in developing countries}},
url = {{http://dx.doi.org/10.1186/1475-2891-11-61}},
doi = {{10.1186/1475-2891-11-61}},
volume = {{11}},
year = {{2012}},
}