School Meals Building Blocks for Healthy Children (2010) / Chapter Skim
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Appendix I: Dietary Intake Data and Calculation of the Target Median Intake for Iron
Appendix I: Dietary Intake Data and Calculation of the Target Median Intake for Iron
Pages 285-292
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From page 285... ...
for Schoolchildren and Reported Nutrient Intakes at the 5th Percentile and Median by Age-Grade Group and Gender • Table I-2 Iron Intake Distribution for 14–18-Year-Old Female Participants (mg/d) • Table I-3 Iron Intake Distribution for 11–13-Year-Old Female Participants (mg/d)
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From page 286... ...
EAR 0.6 0.6 0.7 0.7 1.0 0.9 0.7 Intake at 5th 1.0 1.0 1.2 0.7 1.1 Median Intake 1.6 1.5 1.7 1.4 1.9 1.3 Riboflavin (mg/d) EAR 0.6 0.6 0.8 0.8 1.1 0.9 0.8 Intake at 5th 1.4 1.4 1.6 1.0 1.4 Median Intake 2.3 2.2 2.5 2.0 2.6 1.7 Niacin (mg/d)
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From page 287... ...
Bolded numbers indicate that intake at the 5th percentile is below the EAR. CALCULATION OF THE TARGET MEDIAN INTAKES FOR IRON The Probability Approach for Calculating the Prevalence of Inadequacy The distribution of iron requirements has been estimated using factorial models based on component losses and the deposition of iron.
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From page 288... ...
The intake distribution was based on National School Lunch participants included in the third School Nutrition Dietary Assessment study. For the 14–18-year-old female participants, the intake distribution is in Table I-2.
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From page 289... ...
TABLE I-3 Iron Intake Distribution for 11–13-Year-Old Female Participants (mg/d) Percent 0.01 0.025 0.05 0.08 0.10 0.13 0.15 0.18 0.20 0.23 0.25 0.28 0.30 0.33 Intake 5.61 6.50 7.37 7.99 8.49 8.93 9.32 9.69 10.0 10.4 10.7 11.0 11.3 11.6 Percent 0.35 0.375 0.40 0.43 0.45 0.48 0.50 0.53 0.55 0.58 0.60 0.63 0.65 0.68 Intake 11.9 12.2 12.5 12.8 13.1 13.4 13.7 14.0 14.3 14.7 15.0 15.3 15.7 16.1 Percent 0.70 0.725 0.75 0.78 0.80 0.83 0.85 0.88 0.90 0.93 0.95 0.98 0.99 Intake 16.5 16.9 17.4 17.9 18.4 19.0 19.7 20.5 21.4 22.6 24.2 26.9 30.3 NOTE: mg/d = milligrams/day.
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From page 290... ...
TABLE I-6 Estimated Iron Requirement Distribution for 11–13-Year-Old Females (mg/d) Percentile 0.025 0.05 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.975 Requirement 4.18 4.61 5.16 5.86 6.42 6.94 7.46 7.98 8.70 9.58 11.1 12.6 14.35 NOTE: mg/d = milligrams/day.
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From page 291... ...
This cubic function is used to compute the cumulative distribution for the iron intake distribution needed for the probability approach for calculating the prevalence of inadequacy. The modeled percentiles agreed with reported percentiles exactly when rounded to the reported percentiles.
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From page 292... ...
Using the Probability Approach and the Modeled Distributions to Find Target Median Intakes The probability approach was used with the modeled distributions to determine the prevalence of iron inadequacy for 14–18-year-old females and 11–13-year-old females. Alternative intake distributions were assumed to be of the same distributional form but shifted to higher or lower values.
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