title: Sedentary behavior and psychiatric symptoms in overweight and obese adults with schizophrenia and schizoaffective disorders (WAIST Study).
abstract: OBJECTIVE
  Examine the association between sedentary behavior and psychiatric symptoms among overweight and obese adults with schizophrenia or schizoaffective disorders (SZO/SA).
  
  
  METHODS
  Randomized clinical trial; Weight Assessment and Intervention in Schizophrenia Treatment (WAIST) Study: baseline data collected 2005-2008.
  
  
  METHODS
  University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
  
  
  METHODS
  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).
  
  
  METHODS
  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.
  
  
  CONCLUSIONS
  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.
authors: Department of Epidemiology, School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA. janneyc@upmc.edu
authors: Carol A
authors: CA
authors: Janney
authors: Rohan
authors: R
authors: Ganguli
authors: Caroline R
authors: CR
authors: Richardson
authors: Rob G
authors: RG
authors: Holleman
authors: Gong
authors: G
authors: Tang
authors: Jane A
authors: JA
authors: Cauley
authors: Andrea M
authors: AM
authors: Kriska
mesh_terms: D061725:Accelerometry; D000293:Adolescent; D000328:Adult; D000368:Aged; D015992:Body Mass Index; D005260:Female; D006801:Humans; D007899:Leisure Activities; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications* / Q000523:psychology; D050177:Overweight / Q000150:complications* / Q000523:psychology; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000150:complications* / Q000523:psychology; D012189:Retrospective Studies; D012559:Schizophrenia / Q000150:complications*; D012565:Schizophrenic Psychology; D011795:Surveys and Questionnaires; D055815:Young Adult