Development, validity and reliability of Readiness to change Exercise And Diet (READI)
Nor Azwany Yaacob1, Rohana Abdul Jalil1, Effah Leiylena1, Nani Draman2, Imran Ahmad2
1Department of Community Medicine, 2 Department of Family Medicine, School of Medical Sciences, Universiti Sains Malaysia.
Abstract
Background: Readiness to change behaviour is important to ensure effectiveness of therapeutic lifestyle change advice. Readiness to change diet and exercise was observed to be different in same individual. Purpose: This study aimed to develop and validate a questionnaire to assess readiness level to change diet and exercise. Methods: This is a cross sectional community based study. The questionnaire was developed based on Trans-theoretical model and literature reviews. READI questionnaire consists of two parts, readiness to change diet habit and to do exercise. Each set of self-administered questionnaire consist of 12 items; with 4 items for each behaviour change stage as subdomain; pre-contemplation, contemplation and action. Three response choice of “do not agree”, “less agree” and “agree” was used. Validity study was conducted at health community program on 100 villagers. Confirmatory factor analysis was done to assess construct validity for each questionnaire. Reliability was tested using Raykov-s Rho. Result: The factor loading range of both set was acceptable ranging from 0.22 to 0.81 for exercise questionnaire and 0.30 – 0.89 for diet, respectively. Raykov-s Rho for READI-Diet were 0.71, 074 and 0.83 while READI-Exercise were to 0.68, 0.62 and 0.72 for pre-contemplation, contemplation and action subdomain respectively. Conclusion: The READI questionnaire is a potential tool to assess readiness to change diet and exercise for a Malay speaking population.
Keywords: Readiness to change, Questionnaire, diet, exercise
Topic: Communicable and Non Communicable Diseases