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The Association Between Depressive Symptoms and Limitations in Physical Functioning.

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Depression significantly impairs physical functioning, particularly leisure and social activities. These effects vary by symptom type and sex, highlighting the need for targeted interventions.

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Area of Science:

  • Public Health
  • Psychiatry
  • Epidemiology

Background:

  • Depression is a common mental health disorder associated with significant functional impairment.
  • The precise links between depression, specific physical functioning domains, and variations by symptom type or sex remain unclear.

Purpose of the Study:

  • To investigate the associations between depressive symptoms and physical functioning.
  • To examine how these associations differ across symptom dimensions (cognitive-affective vs. somatic) and by sex.

Main Methods:

  • Utilized data from 31,336 adults in the National Health and Nutrition Examination Survey (NHANES) (2005-2018).
  • Assessed depressive symptoms using the Patient Health Questionnaire (PHQ-9) and physical functioning via the Physical Functioning questionnaire (PFQ).
  • Employed multivariable logistic regression models for association analysis, including sex-stratified analyses.

Main Results:

  • Individuals with depressive symptoms (7.09%) showed substantially higher odds of functional limitations.
  • Limitations in leisure and social activities (LSAs) had the strongest association (aOR=8.04), while lower extremity mobility (LEM) had the weakest (aOR=4.51).
  • Both cognitive-affective and somatic symptoms were strongly linked to LSAs and weakly to LEM; females reported fewer impairments than males across several domains.

Conclusions:

  • Depressive symptoms are robustly linked to physical functioning difficulties.
  • The relationship between depression and physical function varies by symptom subtype and sex.
  • Further research is warranted to elucidate underlying mechanisms and confirm these findings.