Food photography II: use of food photographs for estimating portion size and the nutrient content of meals

Nelson, Michael; Atkinson, Mary; Darbyshire, S.

doi:10.1079/bjn19960007

Cited by 171 publications

(198 citation statements)

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“…Other studies (3,5) have shown the flat slope phenomenon; small portion sizes are overestimated and large portion sizes are underestimated. However, we could not observe this trend in our data.…”

Section: Discussionmentioning

confidence: 87%

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Development and evaluation of a photographic atlas as a tool for dietary assessment studies in Middle East cultures

Tueni

Mounayar

Birlouez‐Aragon³

2012

Public Health Nutr.

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Objective: To assess the errors between estimates of amounts based on photographs and actual quantities of food presented to adults or eaten on the previous day. Design: A photographic atlas was constructed by taking digital photographs of three pre-weighed portion sizes of 212 traditional Lebanese dishes. In a first approach, ten portions of real pre-weighed foods were assessed using the photographic atlas. In a second approach, the participants weighed all foods consumed at one meal and recalled the amount of food that was eaten the previous day using the photographic atlas. Differences between actual quantities and estimation were assessed using a signed rank test (P , 0?05). Spearman's correlation coefficients and bias (Bland-Altman plot) between the methods were calculated. Setting: Lebanese university canteen and Lebanese homes. Subjects: Forty adults (twenty males, twenty females) completed the first protocol and fifty adults (twenty-five males, twenty-five females) completed the second protocol; all were volunteers aged 21 to 62 years. Results: Mean differences between actual and estimated portion sizes by photographs were between 213?1 % and 124?5 % when pre-weighed foods were presented, and between 210?4 % and 13?8 % when foods were consumed the day before. No significant differences were found between actual and estimated portion sizes except for three dishes (loubieh bil zeit, tabbouleh and yachnet bazella). Bland-Altman plots showed good agreement for all dishes with a negligible bias of 20?2 g between estimated and presented portions, and 26?3 g between estimated and eaten portions. Conclusions: In the Lebanese diet, food photographs seem a reliable tool for quantification of food portion sizes.

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Section: Discussionmentioning

confidence: 87%

“…Similarly, the participants in the study of Nelson et al (5) had no difficulty in estimating wedges of quiche or mounds of boiled rice.…”

Section: Discussionmentioning

confidence: 93%

Development and evaluation of a photographic atlas as a tool for dietary assessment studies in Middle East cultures

Tueni

Mounayar

Birlouez‐Aragon³

2012

Public Health Nutr.

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“…The full chart can be downloaded at http://www.kcl.ac.uk/ stoolchart Assessment of fecal output in enteral feeding K Whelan et al the consistency and weight combinations. Photographs were added to the chart because the use of verbal descriptors alone may cause misinterpretation of actual fecal consistency (Mertz et al, 1995), while the estimation of food weight is aided by the use of food photographs for comparison (Nelson et al, 1996). The fecal models were made using predetermined quantities of dried mashed potato, food dye and boiling water.…”

Section: Chart Developmentmentioning

confidence: 99%

Assessment of fecal output in patients receiving enteral tube feeding: validation of a novel chart

2004

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Objective: To develop a practical, valid and reliable chart to assist in the accurate visual characterization of fecal output in patients receiving enteral tube feeding (ETF). Design: A chart incorporating verbal and pictorial descriptors of fecal output was developed. Validity and reliability were assessed by a questionnaire survey of health professionals and a clinical study of patients commencing ETF. Content validity was assessed from the results of the questionnaire, construct validity by contrasting groups analysis, concurrent validity by comparison of the chart with actual fecal weight and inter-rater reliability by independent characterization of the same fecal sample by two nurses. Setting: St George's Hospital, London, UK. Subjects: In all, 35 health professionals completed a questionnaire with respect to the chart. The chart was then used to monitor fecal output in 36 patients commencing ETF for a total of 171 patient-days, during which time nurses used the chart to characterize 269 fecal samples, of which 59 were subsequently weighed. Results: The results of the questionnaire suggested good content validity. The chart demonstrated statistically significant differences in fecal frequency, fecal consistency, fecal score and incidence of diarrhea for contrasting patient groups expected to have different fecal output (Po0.05). The inter-rater reliability was almost perfect for fecal consistency (95% agreement, k ¼ 0.91) and substantial for fecal weight (83%, k ¼ 0.75). In all, 83% of fecal samples were assigned to the correct weight category (k ¼ 0.75). Conclusion:The chart has good content, construct and concurrent validity and inter-rater reliability, and is suitable for both research and clinical use.

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“…For seasonal foods, such as mangoes, women were asked to estimate their average intake when the food was in season. Portion sizes were estimated on the basis of "natural" units (e.g., 1 egg), or by asking the women to select from previously validated sets of 8 colour photographs that represent different portion sizes 8,9 or by using average portion sizes derived from published sources. 10 -13 Additional questions ascertained the main eating habits (e.g., consumption of alcohol, meat and fish and type of fat used in cooking) and changes throughout life.…”

Section: Food-frequency Questionnaire (Ffq)mentioning

confidence: 99%

Lifelong vegetarianism and risk of breast cancer: A population‐based case‐control study among South Asian migrant women living in England

dos‐Santos‐Silva

Mangtani

McCormack

et al. 2002

Intl Journal of Cancer

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To investigate the role of lifelong vegetarianism on the aetiology of female breast cancer, we conducted a population-based case-control study among South Asian migrant women from the Indian subcontinent resident in England. A total of 240 South Asian breast cancer cases were identified from 2 cancer registries during 1995-1999. For each case, 2 age-matched South Asian controls were randomly selected from the age-sex register of the case practice. Lifelong vegetarians had a slight reduction, although not statistically significant, in the odds of breast cancer relative to lifelong meat-eaters, which persisted after adjustment for socio-demographic and reproductive variables [odds ratio (OR)‫;77.0؍‬ 95% confidence interval (CI)‫05.0؍‬ -1.18]. Analysis by food group revealed no linear trend in the odds of breast cancer with increasing consumption of meat (p‫)01.0؍‬ but the odds were higher for women in the top 75%. In contrast, there were strong inverse trends in the odds of breast cancer with increasing intake of vegetables (p‫,)500.0؍‬ pulses (p‫)700.0؍‬ and fibre [non-starch polysaccharides, NSP (p‫,])20.0؍‬ with women in the highest 25% of intake of these foods having about 50% of the odds of those in the lowest ones. Adjustment for intake of vegetables and pulses reverted the odds of breast cancer in lifelong vegetarians relative to lifelong meateaters (OR‫;40.1؍‬ 95% CI‫)86.1-56.0؍‬ and attenuated the quartile-specific estimates for meat intake, whereas the inverse trends in the odds of breast cancer with intake of vegetables and pulses remained after adjustment for type of diet or meat intake. These findings suggest that lifelong vegetarianism may be associated with a reduction in the risk of breast cancer through its association with a higher intake of vegetables and pulses. Although it is not possible to exclude the possibility that lifelong meat abstention may also play a role, the findings provide evidence that a diet rich in vegetables and pulses, such as those typically found in South Asian diets, may be protective against this cancer. © 2002 Wiley-Liss, Inc. Key words: breast cancer; diet; vegetarianism; migrants; South Asians; EnglandMigrant 1,2 and ecological 3 studies have supported the hypothesis that diet may play a role in the aetiology of female breast cancer. However, results from cohort and case-control studies have been inconsistent. Deficiencies in study design or inaccuracies of dietary assessment methods that introduce non-differential misclassification of exposure leading to relative risk estimates biased towards unity could have contributed to the conflicting results. In addition, a common difficulty in investigating relationships between dietary factors and breast cancer risks with case-control or cohort studies, especially if they are likely to be weak associations, is the relative homogeneity of the diet of Western populations where most such epidemiological studies have been carried out. South Asian populations such as those in India, Pakistan and Bangladesh are characterised by a l...

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Food photography II: use of food photographs for estimating portion size and the nutrient content of meals

Cited by 171 publications

References 14 publications

Development and evaluation of a photographic atlas as a tool for dietary assessment studies in Middle East cultures

Development and evaluation of a photographic atlas as a tool for dietary assessment studies in Middle East cultures

Assessment of fecal output in patients receiving enteral tube feeding: validation of a novel chart

Lifelong vegetarianism and risk of breast cancer: A population‐based case‐control study among South Asian migrant women living in England

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