Table 3

Sociodemographic and clinical characteristics of patients who returned their questionnaire

Patients who returned their questionnaire and consented to participate
CharacteristicTargetedOpportunisticTotal
Participants, n (%)212 (26.1)111 (43.0)323 (30.2)
Male, n (%)129 (60.8)75 (67.6)204 (63.2)
Mean age, years (SD)53.0 (12.0)55.3 (12.7)53.8 (12.3)
Mean IMD (SD)43.1 (13.4)41.2 (14.5)42.4 (13.8)
IMD quintile, n (%)
 1a155 (73.1)71 (64.0)226 (70.0)
 245 (21.2)28 (25.2)73 (22.6)
 39 (43)9 (8.1)18 (5.6)
 41 (0.5)3 (2.7)4 (1.2)
 5b2 (0.9)0 (0.0)2 (0.6)
Smoking status, n (%)
 Current smoker132 (62.3)62 (55.9)194 (60.1)
 Ex-smoker97 (45.8)60 (54.1)157 (48.6)
Ethnic group, n (%)
 White54 (25.5)25 (22.5)79 (24.5)
 Mixed0 (0.0)0 (0.0)0 (0.0)
 Asian/Asian British8 (3.8)2 (1.8)10 (3.1)
 Black /Black British4 (1.9)0 (0.0)4 (1.2)
 Chinese/other2 (0.9)0 (0.0)2 (0.6)
 Unknown144 (67.9)84 (75.7)228 (70.6)
Occupational exposures, n (%)99 (46.7)46 (41.4)145 (44.9)
Symptoms, n (%)
 Cough116 (54.7)54 (48.6)170 (52.6)
 Sputum103 (48.6)44 (39.6)147 (45.5)
 Dyspnoea137 (64.6)71 (64.0)208 (64.4)
 Wheeze112 (52.8)44 (39.6)156 (48.3)
 Any of the above166 (74.1)81 (69.2)247 (72.4)
Comorbidities,c n (%)
 COPD5 (2.4)4 (3.6)9 (2.8)
 Emphysema2 (0.9)2 (1.8)4 (1.2)
 Chronic bronchitis13 (6.1)9 (8.1)22 (6.8)
 Asthma23 (10.8)11 (9.9)34 (10.5)
 Pneumonia4 (1.9)7 (6.3)11 (3.4)
 Tuberculosis4 (1.9)2 (1.8)6 (1.9)
 Pleurisy9 (4.2)6 (5.4)15 (4.6)
 Heart disease25 (11.8)20 (18.0)45 (13.9)
Other lung disease34 (16.0)15 (13.5)49 (15.2)
 Total80 (37.7)45 (40.5)125 (38.7)
Attended spirometry, n (%)70 (42.2)28 (34.6)98 (39.7)
Airway obstruction, n (%)10 (14.3)6 (21.4)16 (16.3)
Irreversible airway obstruction, n (%)8 (11.4)5 (17.9)13 (13.3)
Severity of airway obstruction,d n(%)
 Mild10 (100)4 (66.7)14 (87.5)
 Moderate0 (0.0)2 (33.3)2 (12.5)
 Severe0 (0.0)0 (0.0)0 (0.0)
 Attended stop-smoking services, n (%)10 (4.7)2 (1.8)12 (3.7)
 4-week smoking quitters, n (%)3 (30.0)1 (50.0)4 (33.3)
  • IMD = Index of Multiple Deprivation 14 (a measure of socioeconomic deprivation). SD = standard deviation.

  • a Most deprived.

  • b Least deprived.

  • c Patients reporting COPD, emphysema, chronic bronchitis, or asthma were excluded from spirometry and further analysis.

  • d Severity – FEV1 % of predicted: mild = 50–80%; moderate = 30–50%; severe = <30%.