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Psychometric properties of a modified US-household food security survey module in Campinas, Brazil.
Eur J Clin Nutr. 2008 May; 62(5):665-73.EJ

Abstract

OBJECTIVE

To assess the internal validity of a multiple-item measure of household food security in Brazil using statistical methods based on the single-parameter logistic (Rasch) measurement model.

SUBJECTS/METHODS

Sample of the non-institutionalized civilian population living in the municipality of Campinas selected using stratified cluster sampling. Of the 1000 households randomly chosen, 847 responded to the interview. Responses to each of the 15 questions were coded into dichotomous items indicating whether the specific food-insecure condition had occurred (other than in just 1 or 2 days) during the 3 months before the survey. Scaling analyses were conducted separately as well as jointly for adult/household-related items and child-related items. Item-fit statistics were examined to determine the extent to which the items appear to measure the same underlying phenomenon, and item severity scores were compared with those of equivalent items in the US Current Population Survey.

CONCLUSIONS

Except for one item, infit statistics were within a range considered adequate (0.80-1.2), indicating a common phenomenon being measured with approximately equal discrimination. The relative severities of the items in the Campinas survey were generally similar to those of equivalent items in the US Current Population Survey. Analysis of all 15 items together indicates a higher severity level for child-related items compared with equivalent adult-related items.

Authors+Show Affiliations

Department of Human Nutrition, The Ohio State University, 1787 Neil Avenue, Columbus, OH 43210, USA. melgar-quinonez.1@osu.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

17440521

Citation

Melgar-Quinonez, H R., et al. "Psychometric Properties of a Modified US-household Food Security Survey Module in Campinas, Brazil." European Journal of Clinical Nutrition, vol. 62, no. 5, 2008, pp. 665-73.
Melgar-Quinonez HR, Nord M, Perez-Escamilla R, et al. Psychometric properties of a modified US-household food security survey module in Campinas, Brazil. Eur J Clin Nutr. 2008;62(5):665-73.
Melgar-Quinonez, H. R., Nord, M., Perez-Escamilla, R., & Segall-Correa, A. M. (2008). Psychometric properties of a modified US-household food security survey module in Campinas, Brazil. European Journal of Clinical Nutrition, 62(5), 665-73.
Melgar-Quinonez HR, et al. Psychometric Properties of a Modified US-household Food Security Survey Module in Campinas, Brazil. Eur J Clin Nutr. 2008;62(5):665-73. PubMed PMID: 17440521.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Psychometric properties of a modified US-household food security survey module in Campinas, Brazil. AU - Melgar-Quinonez,H R, AU - Nord,M, AU - Perez-Escamilla,R, AU - Segall-Correa,A M, Y1 - 2007/04/18/ PY - 2007/4/19/pubmed PY - 2008/9/16/medline PY - 2007/4/19/entrez SP - 665 EP - 73 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 62 IS - 5 N2 - OBJECTIVE: To assess the internal validity of a multiple-item measure of household food security in Brazil using statistical methods based on the single-parameter logistic (Rasch) measurement model. SUBJECTS/METHODS: Sample of the non-institutionalized civilian population living in the municipality of Campinas selected using stratified cluster sampling. Of the 1000 households randomly chosen, 847 responded to the interview. Responses to each of the 15 questions were coded into dichotomous items indicating whether the specific food-insecure condition had occurred (other than in just 1 or 2 days) during the 3 months before the survey. Scaling analyses were conducted separately as well as jointly for adult/household-related items and child-related items. Item-fit statistics were examined to determine the extent to which the items appear to measure the same underlying phenomenon, and item severity scores were compared with those of equivalent items in the US Current Population Survey. CONCLUSIONS: Except for one item, infit statistics were within a range considered adequate (0.80-1.2), indicating a common phenomenon being measured with approximately equal discrimination. The relative severities of the items in the Campinas survey were generally similar to those of equivalent items in the US Current Population Survey. Analysis of all 15 items together indicates a higher severity level for child-related items compared with equivalent adult-related items. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/17440521/Psychometric_properties_of_a_modified_US_household_food_security_survey_module_in_Campinas_Brazil_ L2 - https://doi.org/10.1038/sj.ejcn.1602760 DB - PRIME DP - Unbound Medicine ER -