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Thorax 54:688-692 doi:10.1136/thx.54.8.688
  • Original article

Prevalence of depression in patients with chronic obstructive pulmonary disease: a systematic review

Table 3

Studies with prevalence of depressive disorders

  • 3-a For each subject the FEV1/FVC value was determined, no clinical diagnosis of COPD was established.

  • 3-b No FEV1 value given, though a clinical diagnosis and chronic irreversible airflow obstruction is described.

  • 3-c FEV1 expressed as % of predicted value.

  • 3-d FEV1/FVC expressed as % of predicted value.

  • 3-e Matched for age, sex, race, education, and socioeconomic status.

  • fMatched for age, sex and education.

  • gRange 0–6.

  • hPost hoc power calculated using the nQuery Advisor program (second version), given α = 0.05, using a two tailed test.

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