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Validation of a Parent Report Questionnaire: The Infant Gastrointestinal Symptom Questionnaire

Overview
Journal Clin Pediatr (Phila)
Publisher Sage Publications
Specialty Pediatrics
Date 2015 Mar 12
PMID 25758425
Citations 27
Authors
Anne W Riley
Jillian Trabulsi
Manjiang Yao
Katherine B Bevans
Patricia A DeRusso
Affiliations
Soon will be listed here.
Abstract

Objective: To evaluate the reliability and validity of the Infant Gastrointestinal Symptom Questionnaire (IGSQ), a tool to assess feeding tolerance in infants.

Methods: Qualitative methods were used to develop IGSQ content across 5 symptom clusters, yielding a 13-item index of parent-reported infant digestion and elimination behaviors over the prior 7 days. Classical psychometric methods evaluated factor structure, interrater and retest reliability, and validity in 4 prospective studies of 836 infants.

Results: Interrater and retest reliability were acceptable to good. IGSQ Index score was highly correlated (r = 0.89) with daily parent reports. IGSQ scores were significantly different between infants whose parents planned to switch formulas because of perceived feeding problems and those without parental concerns.

Conclusions: The IGSQ is a practical, reliable, and valid method for assessment of infant gastrointestinal-related behaviors. Its use in clinical studies can provide empirical evidence to advance parent education regarding both normal and clinically meaningful feeding-related behaviors.

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