Background: The identification of process and treatment variables associated with successful weight loss could be a pivotal strategy to reduce attrition and to improve the effectiveness of dietary treatment in obesity and could help find new therapeutic strategies. Objective: The aim of study is to identify the psychological predictors of weight loss in patients with obesity compliant to continuous treatment at medical centers. Design: Longitudinal observation of a large cohort of obese subjects entering weight loss programs in the years 2000-2002. Subjects/setting: 500 obese patients who completed 12-month weight loss treatment by Italian medical centers offering different programs (78.8% females; age 46.2 ± 10.8 years; BMI 37.3 ± 5.6 kg/m2). Main outcome measured and statistical analysis performed: Measurements were obtained at baseline and following a 12-month weight loss program. Psychological distress, binge eating, body uneasiness, attitude toward eating were evaluated by self-administered questionnaires (Symptom Check List-90, Binge Eating Scale, Body Uneasiness Test, and Eating Inventory (EI - dietary restraint, disinhibition and hunger), together with BMI changes. Weight loss expectations and primary motivation for seeking treatment (health or improving appearance) were also recorded. Results: At follow-up, the mean percent weight loss was similar in males and females. Both hierarchical regression and logistic regression analysis revealed that increased dietary restraint and decreased disinhibition were the only independent psychological predictors of BMI change, after controlling for age, gender and baseline BMI (5% weight loss at 12 months: EI restraint (odds ratio (OR), 1.15; 95% confidence interval (CI), 1.09-1.21) and disinhibition (OR, 0.92; 0.85-0.99); 10% weight loss: restraint (OR, 1.11; 1.06-1.16) and disinhibition (OR, 0.91; 0.85-0.98)). Adjustment for centers did not change the results. Conclusion: Successful weight loss was associated with increased dietary restraint and reduced disinhibition in obese patients seeking weight loss treatment in several medical centers throughout Italy.
Psychological Variables Associated with Weight Loss in Obese Patients Seeking Treatment at Medical Centers / R. Dalle Grave; S. Calugi; F. Corica; S. Di Domizio; G. Marchesini Reggiani; QUOVADIS Study Group. - In: JOURNAL OF THE AMERICAN DIETETIC ASSOCIATION. - ISSN 0002-8223. - STAMPA. - 109:12(2009), pp. 2010-2016. [10.1016/j.jada.2009.09.011]
Psychological Variables Associated with Weight Loss in Obese Patients Seeking Treatment at Medical Centers
CALUGI, SIMONA;DI DOMIZIO, SILVIA;MARCHESINI REGGIANI, GIULIO;
2009
Abstract
Background: The identification of process and treatment variables associated with successful weight loss could be a pivotal strategy to reduce attrition and to improve the effectiveness of dietary treatment in obesity and could help find new therapeutic strategies. Objective: The aim of study is to identify the psychological predictors of weight loss in patients with obesity compliant to continuous treatment at medical centers. Design: Longitudinal observation of a large cohort of obese subjects entering weight loss programs in the years 2000-2002. Subjects/setting: 500 obese patients who completed 12-month weight loss treatment by Italian medical centers offering different programs (78.8% females; age 46.2 ± 10.8 years; BMI 37.3 ± 5.6 kg/m2). Main outcome measured and statistical analysis performed: Measurements were obtained at baseline and following a 12-month weight loss program. Psychological distress, binge eating, body uneasiness, attitude toward eating were evaluated by self-administered questionnaires (Symptom Check List-90, Binge Eating Scale, Body Uneasiness Test, and Eating Inventory (EI - dietary restraint, disinhibition and hunger), together with BMI changes. Weight loss expectations and primary motivation for seeking treatment (health or improving appearance) were also recorded. Results: At follow-up, the mean percent weight loss was similar in males and females. Both hierarchical regression and logistic regression analysis revealed that increased dietary restraint and decreased disinhibition were the only independent psychological predictors of BMI change, after controlling for age, gender and baseline BMI (5% weight loss at 12 months: EI restraint (odds ratio (OR), 1.15; 95% confidence interval (CI), 1.09-1.21) and disinhibition (OR, 0.92; 0.85-0.99); 10% weight loss: restraint (OR, 1.11; 1.06-1.16) and disinhibition (OR, 0.91; 0.85-0.98)). Adjustment for centers did not change the results. Conclusion: Successful weight loss was associated with increased dietary restraint and reduced disinhibition in obese patients seeking weight loss treatment in several medical centers throughout Italy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
