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Sedentary behavior and psychiatric symptoms in overweight and obese adults with schizophrenia and schizoaffective disorders (WAIST Study).

Janney CA, Ganguli R, Richardson CR, Holleman RG, Tang G, Cauley JA, Kriska AM. Sedentary behavior and psychiatric symptoms in overweight and obese adults with schizophrenia and schizoaffective disorders (WAIST Study). Schizophrenia Research. 2013 Apr 1; 145(1-3):63-8.

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Abstract:

OBJECTIVE: Examine the association between sedentary behavior and psychiatric symptoms among overweight and obese adults with schizophrenia or schizoaffective disorders (SZO/SA). DESIGN: Randomized clinical trial; Weight Assessment and Intervention in Schizophrenia Treatment (WAIST) Study: baseline data collected 2005-2008. SETTING: University of Pittsburgh Medical Center, Pittsburgh, PA, USA. PARTICIPANTS: Community-dwelling adults diagnosed with SZO/SA, with mild symptom severity [Positive and Negative Syndrome Scale (PANSS) < 90], who were interested in losing weight, age 18-70years, BMI > 27kg/m(2). MEASUREMENTS: Objectively measured sedentary behavior by accelerometry, and psychopathology assessed by PANSS. Participants wore the actigraphs for 7 consecutive days during their waking hours. Sedentary behavior was defined as = 100 counts per minute during wear-time and excluded sleep and non-wear time. RESULTS: On average, 81% of the participant''s monitoring time or 756min/day was classified as sedentary behavior using accelerometry. No association was observed between sedentary behaviors and PANSS psychiatric symptoms [total (p = 0.75), positive (p = 0.81), negative (p = 0.59) and general psychopathology (p = 0.65) subscales]. No association was observed between sedentary behaviors and age, race, gender and BMI. CONCLUSION: From a clinical and public health perspective, the amount of time (approximately 13h) and percentage of time (81% excluding non-wear time associated with sleeping) engaged in sedentary behavior among overweight and obese adults in this population is alarming, and points to an urgent need for interventions to decrease sedentary behaviors. The lack of associations between sedentary behavior and psychiatric symptoms may be due to a ceiling effect for sedentary behavior.





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