Psychometric Properties of the Weight Loss Readiness Test in Active Duty Military Personnel Enrolled in a Weight Management Trial

• Published in: Military medicine 2024-08, Vol.189 (9-10), p.e2085-e2093
• Main Authors: Tynan, Mara, Afari, Niloofar, Roesch, Scott, Herbert, Matthew S
• Format: Article
• Language: English
• Subjects: Adult; Body Mass Index; Factor Analysis, Statistical; Female; Humans; Male; Military health care; Military personnel; Military Personnel - psychology; Military Personnel - statistics & numerical data; Motivation; Psychometrics - instrumentation; Psychometrics - methods; Quantitative psychology; Reproducibility of Results; Surveys and Questionnaires; Validity; Weight control; Weight Loss; Weight Reduction Programs - methods; Weight Reduction Programs - standards; Weight Reduction Programs - statistics & numerical data
• ISSN: 0026-4075; 1930-613X; 1930-613X
• DOI: 10.1093/milmed/usae221

ABSTRACT Introduction The Weight Loss Readiness Test (WLRT) was developed to encourage consideration of factors influencing readiness to engage in weight loss. The WLRT is used clinically, most notably to assess motivation before initiating Navy weight management programs, yet little is known about its psychometric properties. Materials and Methods This study examined the reliability, convergent and predictive validity, and factor structure of the WLRT in a sample of active duty service members enrolling in a Navy-based weight management program (N = 178, identified as female = 61%, mean age = 29.7 years, mean baseline body mass index = 33.1 kg/m2). All procedures were approved by the respective Institutional Review Boards and research committees. Results Exploratory factor analysis revealed a 5-factor structure explaining 52% of the variance that best fit the data with low to moderate correlations between factors: (1) Motivation, (2) Exercise-Related Confidence, (3) Non-Exercise Confidence, (4) Cues, and (5) Anticipated Satisfaction. Internal reliability of subscales was acceptable to good (α = 0.755-0.903). Generally, convergent validity was found between the identified subscales and other measures of motivation, confidence, and disinhibited eating in expected directions. No relationships were found between the subscales and predictive validity outcomes (weight change, program attendance). Conclusions Results indicate adequate structural and convergent validity in the WLRT, but that weight loss readiness, as measured by the WLRT, does not provide predictive validity regarding weight loss or attendance outcomes in this sample. Nonetheless, this measure offers clinical utility in fostering thoughtful conversations about weight loss. The WLRT uniquely focuses on long-term maintenance of behavior change and differentiates between exercise-related and non-exercise confidence. Future studies should further probe the utility of this measure in other populations and the contexts in which it is being used.