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Nutrients 2013, 5(10), 3828-3838; doi:10.3390/nu5103828
Article

An Instrument to Measure Adherence to Weight Loss Programs: The Compliance Praxis Survey-Diet (COMPASS-Diet)

1,* , 2
,
3
 and
3
1 School of Public Health, Queensland University of Technology, Brisbane, Queensland, 4059, Australia 2 Ludwig Boltzmann Institute Health Promotion Research, 1020 Vienna, Austria 3 Center of Public Health, Institute of Social Medicine, Medical University of Vienna, 1090 Wien, Austria
* Author to whom correspondence should be addressed.
Received: 6 May 2013 / Revised: 26 July 2013 / Accepted: 12 September 2013 / Published: 26 September 2013
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Abstract

Adherence to behavioral weight loss strategies is important for weight loss success. We aimed to examine the reliability and validity of a newly developed compliance praxis-diet (COMPASS-diet) survey with participants in a 10-week dietary intervention program. During the third of five sessions, participants of the “slim-without-diet” weight loss program (n = 253) completed the COMPASS-diet survey and provided data on demographic and clinical characteristics, and general self-efficacy. Group facilitators completed the COMPASS-diet-other scale estimating participants’ likely adherence from their perspective. We calculated internal consistency, convergent validity, and predictive value for objectively measured weight loss. Mean COMPASS-diet-self score was 82.4 (SD 14.2) and COMPASS-diet-other score 80.9 (SD 13.6) (possible range 12–108), with lowest scores in the normative behavior subscale. Cronbach alpha scores of the COMPASS-diet-self and -other scale were good (0.82 and 0.78, respectively). COMPASS-diet-self scores (r = 0.31) correlated more highly with general self-efficacy compared to COMPASS-diet-other scores (r = 0.04) providing evidence for validity. In multivariable analysis adjusted for age and gender, both the COMPASS-diet-self (F = 10.8, p < 0.001, r2 = 0.23) and other (F = 5.5, p < 0.001, r2 = 0.19) scales were significantly associated with weight loss achieved at program conclusion. COMPASS-diet surveys will allow group facilitators or trainers to identify patients who need additional support for optimal weight loss.
Keywords: COMPASS-diet; weight-loss; surveys COMPASS-diet; weight-loss; surveys
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Janda, M.; Zeidler, D.; Böhm, G.; Schoberberger, R. An Instrument to Measure Adherence to Weight Loss Programs: The Compliance Praxis Survey-Diet (COMPASS-Diet). Nutrients 2013, 5, 3828-3838.

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