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Table 1 Prevalence (%) of all cough within baseline categories of demographic characteristics and mental health status in subjects without identifiable respiratory disease (n = 3355).

From: Associations of physical and mental health problems with chronic cough in a representative population cohort

   Cough +/- sputum
All subjects (n = 3960)   20.5
No respiratory disease (n = 3355)   18.2
Sex Male 18.5
  Female 16.0
Smoking status Current 29.6
  Former 15.6
  Never 11.8
Age (years) < 40 20.0
  40-54 12.2
  55 and over 18.7
GHQ 28   
Mental health condition Yes 26.9
  No 14.2
Somatic symptoms Yes 27.6
  No 14.0
Anxiety and insomnia Yes 23.6
  No 15.4
Social dysfunction Yes 28.3
  No 15.2
Severe depression Yes 34.4
  No 15.7