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Within- and between-individual variation in energy intakes by low-income Peruvian infants.
Eur J Clin Nutr. 1994 May; 48(5):333-40.EJ

Abstract

OBJECTIVES

(i) To examine the components of variation in infant energy intake. (ii) To calculate the precision of estimates of energy intake from different sources. (iii) To estimate the number of dietary studies required to estimate true energy intake with varying degrees of precision.

DESIGN

Energy intakes were determined from monthly 12-h observations with test-weighing of breastmilk and all foods consumed. Variance components were evaluated by pooling results of studies performed when infants were 1-4, 5-8 and 9-12 months old.

SETTING

Pueblo Joven Huáscar, a low-income, peri-urban community in Lima, Peru.

SUBJECTS

124 infants who were enrolled at birth and followed monthly.

RESULTS

Within-to-between infant variance ratios were > 1.0 for total energy and energy from solid foods, and < 1.0 for energy from breast- and non-human milks during the 4-month periods examined. Total energy and energy from breastmilk were estimated to within 13-24% of infants' true intake. Non-breastmilk energy was estimated to within 19-143% of true intake. Four dietary studies per age period are required to estimate total energy and breastmilk energy consumption with 20-30% precision. At least 16 studies are required to estimate infants' average energy intake from solid foods from 5-8 months with 30% precision.

CONCLUSIONS

The degree of precision achieved during assessment of infants' usual energy intake changes with age and composition of the diet. Thus, the number of dietary studies required to obtain a fixed level of precision differs according to these characteristics.

Authors+Show Affiliations

Piwoz EG
Department of International Health, School of Hygiene and Public Health, Johns Hopkins University, Baltimore, MD 21205.
Creed de Kanashiro H
No affiliation info available
Lopez de Romaña G
No affiliation info available
Black RE
No affiliation info available
Brown KH
No affiliation info available

MeSH

Breast FeedingDeveloping CountriesEnergy IntakeFemaleHumansInfantInfant FoodInfant Nutritional Physiological PhenomenaInfant, NewbornLongitudinal StudiesMaleNutrition SurveysNutritive ValuePeruPovertyUrban Population

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

8055849

Citation

Piwoz, E G., et al. "Within- and Between-individual Variation in Energy Intakes By Low-income Peruvian Infants." European Journal of Clinical Nutrition, vol. 48, no. 5, 1994, pp. 333-40.
Piwoz EG, Creed de Kanashiro H, Lopez de Romaña G, et al. Within- and between-individual variation in energy intakes by low-income Peruvian infants. Eur J Clin Nutr. 1994;48(5):333-40.
Piwoz, E. G., Creed de Kanashiro, H., Lopez de Romaña, G., Black, R. E., & Brown, K. H. (1994). Within- and between-individual variation in energy intakes by low-income Peruvian infants. European Journal of Clinical Nutrition, 48(5), 333-40.
Piwoz EG, et al. Within- and Between-individual Variation in Energy Intakes By Low-income Peruvian Infants. Eur J Clin Nutr. 1994;48(5):333-40. PubMed PMID: 8055849.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Within- and between-individual variation in energy intakes by low-income Peruvian infants. AU - Piwoz,E G, AU - Creed de Kanashiro,H, AU - Lopez de Romaña,G, AU - Black,R E, AU - Brown,K H, PY - 1994/5/1/pubmed PY - 1994/5/1/medline PY - 1994/5/1/entrez KW - Age Factors KW - Americas KW - Bottle Feeding KW - Breast Feeding KW - Caloric Intake KW - Demographic Factors KW - Developing Countries KW - Diet KW - Economic Factors KW - Follow-up Studies KW - Health KW - Infant KW - Infant Nutrition KW - Latin America KW - Low Income Population KW - Nutrition KW - Peru KW - Population KW - Population Characteristics KW - Social Class KW - Socioeconomic Factors KW - Socioeconomic Status KW - South America KW - Studies KW - Weaning KW - Youth SP - 333 EP - 40 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 48 IS - 5 N2 - OBJECTIVES: (i) To examine the components of variation in infant energy intake. (ii) To calculate the precision of estimates of energy intake from different sources. (iii) To estimate the number of dietary studies required to estimate true energy intake with varying degrees of precision. DESIGN: Energy intakes were determined from monthly 12-h observations with test-weighing of breastmilk and all foods consumed. Variance components were evaluated by pooling results of studies performed when infants were 1-4, 5-8 and 9-12 months old. SETTING: Pueblo Joven Huáscar, a low-income, peri-urban community in Lima, Peru. SUBJECTS: 124 infants who were enrolled at birth and followed monthly. RESULTS: Within-to-between infant variance ratios were > 1.0 for total energy and energy from solid foods, and < 1.0 for energy from breast- and non-human milks during the 4-month periods examined. Total energy and energy from breastmilk were estimated to within 13-24% of infants' true intake. Non-breastmilk energy was estimated to within 19-143% of true intake. Four dietary studies per age period are required to estimate total energy and breastmilk energy consumption with 20-30% precision. At least 16 studies are required to estimate infants' average energy intake from solid foods from 5-8 months with 30% precision. CONCLUSIONS: The degree of precision achieved during assessment of infants' usual energy intake changes with age and composition of the diet. Thus, the number of dietary studies required to obtain a fixed level of precision differs according to these characteristics. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/8055849/Within__and_between_individual_variation_in_energy_intakes_by_low_income_Peruvian_infants_ L2 - https://medlineplus.gov/infantandnewbornnutrition.html DB - PRIME DP - Unbound Medicine ER -