Sitting-time, physical activity, and depressive symptoms in mid-aged women
American Journal of Preventive Medicine, Exclusive Author Commentary  Clinical Article

van Uffelen JGZ et al. – The study aims to examine concurrent and prospective associations between both sitting–time and physical activity with prevalent depressive symptoms in mid–aged Australian women. Increasing physical activity to a level commensurate with guidelines can alleviate current depression symptoms and prevent future symptoms in mid–aged women. Reducing sitting–time may ameliorate current symptoms.

Methods

  • Data were from 8950 women, aged 50–55 years in 2001, who completed mail surveys in 2001, 2004, 2007, and 2010.
  • Depressive symptoms were assessed using the Center for Epidemiological Studies Depression questionnaire.
  • Associations between sitting-time (≤4 hours/day, >4–7 hours/day, >7 hours/day) and physical activity (none, some, meeting guidelines) with depressive symptoms (symptoms/no symptoms) were examined in 2011 in concurrent and lagged mixed-effect logistic modeling.
  • Both main effects and interaction models were developed.

Results

  • In main effects modeling, women who sat >7 hours/day (OR=1.47, 95% CI=1.29, 1.67) and women who did no physical activity (OR=1.99, 95% CI=1.75, 2.27) were more likely to have depressive symptoms than women who sat ≤4 hours/day and who met physical activity guidelines, respectively.
  • In interaction modeling, the likelihood of depressive symptoms in women who sat >7 hours/day and did no physical activity was triple that of women who sat ≤4 hours/day and met physical activity guidelines (OR 2.96, 95% CI=2.37, 3.69).
  • In prospective main effects and interaction modeling, sitting-time was not associated with depressive symptoms, but women who did no physical activity were more likely than those who met physical activity guidelines to have future depressive symptoms (OR=1.26, 95% CI=1.08, 1.47).

An interesting finding in our study was that sitting-time was associated with current depressive symptoms, but not with future symptoms. There are several potential explanations for this, which are described in more detail in the article. A particularly interesting explanation is the potential of reverse causality. Fatigue and loss of energy are common depressive symptoms and it could therefore be the case that, instead of high sitting-time causing depressive symptoms, depressive symptoms cause high sitting-time. Although this seems to be a logical explanation, we did not find evidence for reverse causation in our study. For a 6 minute video cast of the paper, please see: http://www.scivee.tv/node/60419

Please login or register to follow this author.
Are you sure you want to Unfollow this Author?
► Click here to access PubMed, Publisher and related articles...
<< Previous Article | Next Article >>

Your Unread Messages in Psychiatry

See All >> Messages include industry-sponsored communications and special communications from MDLinx

Most Popular Psychiatry Articles

1 Zolpidem and the risk of Parkinson's disease: A nationwide population-based study Journal of Psychiatric Research, August 1, 2014    Clinical Article

2 Vascular Endothelial Growth Factor: A potential diagnostic biomarker for major depression Journal of Psychiatric Research, September 19, 2014    Clinical Article

3 Effect of anti-inflammatory treatment on depression, depressive symptoms, and adverse effects: A systematic review and meta-analysis of randomized clinical trials JAMA Psychiatry, October 22, 2014    Evidence Based Medicine    Clinical Article

4 Comparative efficacy and acceptability of drug treatments for bipolar depression: A multiple-treatments meta-analysis Acta Psychiatrica Scandinavica, October 10, 2014    Evidence Based Medicine    Clinical Article

5 Antidepressants and the risk of hyponatraemia: A class-by-class review of the literature Psychosomatics, September 15, 2014    Review Article

6 Comparison of metabolic effects of aripiprazole, quetiapine and ziprasidone after 12 weeks of treatment in first treated episode of psychosis Schizophrenia Research, September 24, 2014    Clinical Article

7 Comparison of pro-inflammatory cytokines among patients with bipolar disorder and unipolar depression and normal controls Bipolar Disorders, October 3, 2014    Clinical Article

8 Diffusion tensor imaging predictors of treatment outcomes in major depressive disorder The British Journal of Psychiatry, October 8, 2014    Clinical Article

9 A comparison between phone-based psychotherapy with and without text messaging support in between sessions for crisis patients Full Text Journal of Medical Internet Research, October 13, 2014    Free full text    Clinical Article

10 Neurocognitive performance and serial intravenous subanesthetic ketamine in treatment-resistant depression International Journal of Neuropsychopharmacology, October 2, 2014    Clinical Article

11 Association of ARRB1 polymorphisms with the risk of major depressive disorder and with treatment response to mirtazapine Journal of Psychopharmacology, October 16, 2014    Clinical Article

12 Cognitive improvement of attention and inhibition in the late afternoon in children with attention-deficit hyperactivity disorder (ADHD) treated with osmotic-release oral system methylphenidate Journal of Child Neurology, October 15, 2014    Clinical Article

13 Prazosin in the treatment of PTSD Journal of Psychiatric Practice, July 25, 2014    Review Article

14 Guanfacine for attention deficit and hyperactivity disorder in pediatrics: a systematic review and meta-analysis European Neuropsychopharmacology, September 2, 2014    Evidence Based Medicine    Review Article

15 Attention-deficit/hyperactivity disorder and adverse health outcomes in adults The Journal of Nervous and Mental Disease, October 29, 2014    Clinical Article

16 Therapist-assisted Internet–delivered Cognitive Behavior Therapy for depression and anxiety: Translating evidence into clinical practice Journal of Anxiety Disorders, October 17, 2014    Clinical Article

17 Effects of post-session administration of methylene blue on fear extinction and contextual memory in adults with claustrophobia American Journal of Psychiatry, October 6, 2014    Evidence Based Medicine    Clinical Article

18 Internet-delivered exposure-based cognitive-behavioural therapy and behavioural stress management for severe health anxiety: Randomised controlled trial The British Journal of Psychiatry, October 14, 2014    Clinical Article

19 Psychiatric correlates of alcohol and tobacco use disorders in U.S. adults aged 65 years and older: Results from the 2001-2002 National Epidemiologic Survey of Alcohol and Related Conditions The American Journal of Geriatric Psychiatry, October 9, 2014    Clinical Article

20 Cigarette smoking and the onset and persistence of depression among adults in the United States: 1994-2005 Comprehensive Psychiatry, October 28, 2014    Clinical Article

Indexed Journals in Psychiatry : Current Psychiatry, Bipolar Disorders, American Journal of Psychiatry, Addictionmore

Register now to view all the MDLinx contents (FREE)!

  • Stay current on the latest literature, research and clinical news
  • Get special communications and offers from MDLinx and our sponsors
  • Receive invitations to paid market research
View Samples and Register

Connect with us, stay current.

Receive the latest mecial news
updates for free via email

Sign up!

Subscribe to our free RSS feeds:

Get the latest news in your specialty automatically added to your newsreader or your personal My Yahoo!, Google, My MSN or My AOL page. Learn More

Close