Short-term repeatability of a food frequency questionnaire in New Zealand children aged 1–14 y

Metcalf, Patricia; Scragg, Robert; Sharpe, Susan J.; Fitzgerald, Eljon; Schaaf, David; Watts, Corey D.

doi:10.1038/sj.ejcn.1601717

Cited by 37 publications

(52 citation statements)

References 14 publications

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“…The final score of the modified MEDFICTS exhibited moderate testeretest reliability (r¼0.36; P¼0.02) in the grade-six children as a group. This correlation is similar to some, 25 yet lower than other, 26 testeretest studies in children, but considerable differences in research contexts, study designs, and outcome measures can explain this. Previous review studies have shown that reliability correlations for food frequency questionnaires among school-age children vary considerably, 27,28 confirming instrument and setting effects.…”

Section: Discussionsupporting

confidence: 75%

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Reliability and Validity of a Modified MEDFICTS Dietary Fat Screener in South African Schoolchildren Are Determined by Use and Outcome Measures

Wenhold¹,

MacIntyre²,

Rheeder³

2014

Journal of the Academy of Nutrition and Dietetics

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Background In South Africa, noncommunicable diseases and obesity are increasing and also affect children. No validated assessment tools for fat intake are available. ObjectiveTo determine test-retest reliability and relative validity of a pictorial modified meats, eggs, dairy, fried foods, fats in baked goods, convenience foods, table fats, and snacks (MEDFICTS) dietary fat screener.Design We determined test-retest reliability and diagnostic accuracy with the modified MEDFICTS as the index test and a 3-day weighed food record and parental completion of the screener as primary and secondary reference methods, respectively.Participants/setting Grade-six learners (aged 12 years, 4 months) in an urban, middleclass school (n=93) and their parents (n=72).Outcome measures Portion size, frequency of intake, final score, and classification of fat intake of the modified MEDFICTS, and percent energy from fat, saturated fatty acids, and cholesterol of the food record. Statistical analyses For categorical data agreement was based on kappa statistics,McNemar's test for symmetry, and diagnostic performance parameters. Continuous data were analyzed with correlations, mean differences, the Bland-Altman method, and receiver operating characteristics. ResultsThe classification of fat intake by the modified MEDFICTS was test-retest reliable.Final scores of the group did not differ between administrations (P=0.86). The correlation of final scores between administrations was significant for girls only (r=0.58; P=0.01). Reliability of portion size and frequency of intake scores depended on the food category. For girls the screener final score was significantly (P<0.5) correlated to total, saturated fat, and cholesterol intakes (but not to percentenergy from fat and saturated fatty acids intakes). The sensitivity of the modified MEDFICTS was very high (>90%), but chance corrected agreement between the classifications was poor. Parents did not agree with their children.

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Section: Discussionsupporting

confidence: 75%

“…26,31 In most studies among schoolchildren the first measurement of dietary intake gave higher values than the second. 27 Here our findings tended to differ.…”

Section: Discussionmentioning

confidence: 99%

Reliability and Validity of a Modified MEDFICTS Dietary Fat Screener in South African Schoolchildren Are Determined by Use and Outcome Measures

Wenhold¹,

MacIntyre²,

Rheeder³

2014

Journal of the Academy of Nutrition and Dietetics

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“…There have been reports on sex/gender differences in reproducibility of FFQs in adults and self-reporting children and adolescents; however, in general, results are not conclusive. 7,8,17,18,23 One possible explanation of our results might be the fact that we used proxy reports on diet. When parents and other proxies report on the children's intakes, it is possible that the sex of the proxy is more important than the sex of the child.…”

Section: Discussionmentioning

confidence: 83%

“…Previous studies from the United States of America, New Zealand and Belgium that have reported reproducibility of food intakes derived from FFQs in children show a wide range of correlation coefficient values ranging from 0.24 to 0.82. [17][18][19][20] Design of the FFQs, statistical methods, data management and the time between first and second administrations vary in these studies, making it difficult to directly compare results. Nevertheless, they give some indication of the typical range of correlation coefficients.…”

Section: Discussionmentioning

confidence: 99%

Reproducibility of food consumption frequencies derived from the Children's Eating Habits Questionnaire used in the IDEFICS study

et al. 2011

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Objective: To investigate the reproducibility of food consumption frequencies derived from the food frequency section of the Children's Eating Habits Questionnaire (CEHQ-FFQ) that was developed and used in the IDEFICS (Identification and prevention of dietary-and lifestyle-induced health effects in children and infants) project to assess food habits in 2-to 9-year-old European children. Design and methods: From a subsample of 258 children who participated in the IDEFICS baseline examination, parental questionnaires of the CEHQ were collected twice to assess reproducibility of questionnaire results from 0 to 354 days after the first examination. Weighted Cohen's kappa coefficients (k) and Spearman's correlation coefficients (r) were calculated to assess agreement between the first and second questionnaires for each food item of the CEHQ-FFQ. Stratification was performed for sex, age group, geographical region and length of period between the first and second administrations. Fisher's Z transformation was applied to test correlation coefficients for significant differences between strata. Results: For all food items analysed, weighted Cohen's kappa coefficients (k) and Spearman's correlation coefficients (r) were significant and positive (Po0.001). Reproducibility was lowest for diet soft drinks (k ¼ 0.23, r ¼ 0.32) and highest for sweetened milk (k ¼ 0.68, r ¼ 0.76). Correlation coefficients were comparable to those of previous studies on FFQ reproducibility in children and adults. Stratification did not reveal systematic differences in reproducibility by sex and age group. Spearman's correlation coefficients differed significantly between northern and southern European countries for 10 food items. In nine of them, the lower respective coefficient was still high enough to conclude acceptable reproducibility. As expected, longer time (4128 days) between the first and second administrations resulted in a generally lower, yet still acceptable, reproducibility. Conclusion: Results indicate that the CEHQ-FFQ gives reproducible estimates of the consumption frequency of 43 food items from 14 food groups in European children.

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“…The pilot testing was to assess the acceptability of the 24-h record-assisted recall computerized programme, anthropometric measurements, socio-demographic, physical activity, food security and medical history questions, and the repeatability of the FFQ (Metcalf et al, 2003). Starting points (addresses) were randomly selected with probability proportional to mesh block size in prescribed areas by Statistics New Zealand.…”

Section: Recruitment Of Childrenmentioning

confidence: 99%

Design effects associated with dietary nutrient intakes from a clustered design of 1 to 14-year-old children

et al. 2007

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Objective: To calculate intra-cluster and intra-household design effects and intra-class correlation coefficients for dietary nutrients obtained from a 24 h record-assisted recall. Design: Children were recruited using clustered probability sampling. Randomly selected starting-point addresses were obtained with probability proportional to mesh block size. Setting: Children aged 1-14 years in New Zealand. Subjects: There were 125 children in 50 clusters, giving an average of 2.498 children per cluster. In 15 homes, there were two children for the calculation of intra-household statistics. Results: Intra-cluster design effects ranged from 1.0 for cholesterol, b-carotene, vitamin A, vitamin D, vitamin E, selenium, fructose and both carbohydrate and protein expressed as their contribution to total energy intakes to 1.552 for saturated fat, with a median design effect of 1.148. Their corresponding intra-cluster correlations ranged from 0 to 0.37, respectively. Intrahousehold design effects ranged from 1.0 for height to 1.839 for vitamin B 6 , corresponding to intra-household correlations of 0 and 0.839. The median intra-household design effect was 1.550. Using a sampling design of two to three households per cluster for estimating dietary nutrient intakes would need, on average, a 15% increase in sample size compared with simple random sampling with a maximum increase of 55% to cover all nutrients. Conclusions: These data enable sample sizes for dietary nutrients to be estimated for both cluster and non-cluster sampling for children aged 1-14 years. The larger design effects found within households suggest that little extra information may be obtained by sampling more than one child per household.

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Short-term repeatability of a food frequency questionnaire in New Zealand children aged 1–14 y

Cited by 37 publications

References 14 publications

Reliability and Validity of a Modified MEDFICTS Dietary Fat Screener in South African Schoolchildren Are Determined by Use and Outcome Measures

Reliability and Validity of a Modified MEDFICTS Dietary Fat Screener in South African Schoolchildren Are Determined by Use and Outcome Measures

Reproducibility of food consumption frequencies derived from the Children's Eating Habits Questionnaire used in the IDEFICS study

Design effects associated with dietary nutrient intakes from a clustered design of 1 to 14-year-old children

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