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Physician Communication Techniques and Weight Loss in Adults

Project CHAT

      Background

      Physicians are encouraged to counsel overweight and obese patients to lose weight.

      Purpose

      It was examined whether discussing weight and use of motivational interviewing techniques (e.g., collaborating, reflective listening) while discussing weight predicted weight loss 3 months after the encounter.

      Methods

      Forty primary care physicians and 461 of their overweight or obese patient visits were audio recorded between December 2006 and June 2008. Patient actual weight at the encounter and 3 months after the encounter (n=426); whether weight was discussed; physicians' use of motivational interviewing techniques; and patient, physician, and visit covariates (e.g., race, age, specialty) were assessed. This was an observational study and data were analyzed in April 2009.

      Results

      No differences in weight loss were found between patients whose physicians discussed weight or did not. Patients whose physicians used motivational interviewing–consistent techniques during weight-related discussions lost weight 3 months post-encounter; those whose physician used motivational interviewing–inconsistent techniques gained or maintained weight. The estimated difference in weight change between patients whose physician had a higher global motivational interviewing–Spirit score (e.g., collaborated with patient) and those whose physician had a lower score was 1.6 kg (95% CI=−2.9, −0.3, p=0.02). The same was true for patients whose physician used reflective statements: 0.9 kg (95% CI=−1.8, −0.1, p=0.03). Similarly, patients whose physicians expressed only motivational interviewing–consistent behaviors had a difference in weight change of 1.1 kg (95% CI=−2.3, 0.1, p=0.07) compared to those whose physician expressed only motivational interviewing–inconsistent behaviors (e.g., judging, confronting).

      Conclusions

      In this observational study, use of motivational interviewing techniques during weight loss discussions predicted patient weight loss.
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