title: Prospective associations between sedentary behaviour and risk of depression in socio-economically disadvantaged women.
abstract: OBJECTIVE
  Although recent cross-sectional research has suggested a positive association between sedentary behaviour and risk of depression, the direction of associations is unclear. This study aimed to investigate prospective associations between sedentary behaviour and risk of depression in both directions in socio-economically disadvantaged women.
  
  
  METHODS
  1511 women, aged 18-45, completed self-report validated measures of sedentary behaviour (TV viewing, computer use, overall sitting time and screen time) as well as depressive symptoms (CES-D-10) in 2007/08 (T1) and 2010/11 (T2). Linear regression analyses examined associations between sedentary behaviours at T1 and depressive symptoms at T2, and multinomial logistic regression analyses examined associations between depressive symptoms at T1 and sedentary behaviours at T2.
  
  
  RESULTS
  Although prospective analyses indicated no association between T1 sedentary behaviours and depressive symptoms at T2, results showed that depressive symptoms at T1 were associated with higher levels of TV viewing (adjusted odds ratio: 1.032, 95% CI: 1.00, 1.07) at T2.
  
  
  CONCLUSIONS
  Women's sedentary behaviour may not predict subsequent depressive symptoms; however, women's risk of depression may be predictive of engaging in greater amounts of TV viewing. Confirmation of these findings using further prospective and intervention study designs is required.
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Hwy, Burwood, VIC 3125, Australia. Electronic address: mteych@deakin.edu.au.
authors.forename: Megan
authors.initials: M
authors.lastname: Teychenne
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Hwy, Burwood, VIC 3125, Australia.
authors.forename: Gavin
authors.initials: G
authors.lastname: Abbott
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Hwy, Burwood, VIC 3125, Australia.
authors.forename: Kylie
authors.initials: K
authors.lastname: Ball
authors.affiliation: Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Hwy, Burwood, VIC 3125, Australia.
authors.forename: Jo
authors.initials: J
authors.lastname: Salmon
mesh_terms: D000293:Adolescent; D000328:Adult; D003863:Depression / Q000453:epidemiology*; D005260:Female; D006801:Humans; D016014:Linear Models; D008137:Longitudinal Studies; D008875:Middle Aged; D011204:Poverty Areas; D011446:Prospective Studies; D057185:Sedentary Behavior; D057566:Self Report; D012923:Social Class; D013690:Television / Q000706:statistics & numerical data*; D014739:Victoria / Q000453:epidemiology; D055815:Young Adult
keywords: Depressive symptoms; Disadvantaged; Longitudinal study; Sedentary behaviour