Development and Validation of the Transtheoretical Model-based Questionnaire to Assess Dietary Iron Intake in Adolescent Girls

A Fast Track Open Access article published in the Health Behavior and Policy Review Journal.

Authors:

Chethana Chandrasekar, MSc
Priyanka Pareek, PhD
Aparna Thorat, PhD
Poonam Khanna, PhD
Rashmi Kulkarni, MSc

Objective:

In this study, our objective was to develop and validate a Transtheoretical Model (TTM)-based questionnaire to assess dietary iron intake in adolescent girls of ages 13-18 years.

Methods:

A 38-item pool developed based on TTM constructs underwent psychometric analysis. We assessed face and content validity by participants and experts. We measured internal consistency and stability using Cronbach’s alpha and an intraclass correlation coefficient (ICC). We assessed construct validity through confirmatory factor analysis (CFA).

Results:

The items contributed to a satisfactory content validity index (CVI ≥ .8). CFA showed good model fit with comparative factor index (CFI = .991-1.00), goodness of fit index (GFI = .954-.983), and root mean square error of approximation (RMSEA = .059-.079). The questionnaire demonstrated satisfactory reliability, with internal consistency (Cronbach’s α = .734-.919) and stability (ICC = .775-.879).

Conclusions:

This validated questionnaire enables assessment of behavioral changes related to dietary iron intake in adolescent girls and can guide interventions to improve iron consumption.

Source: Health Behavior and Policy Review
Publisher: Paris Scholar Publishing Ltd.
Article Link: https://doi.org/10.14485/HBPR.12.3.6