Table 1 Baseline characteristics: all those eligible for analysis in cohort and respondents to 6-month questionnaire

From: Self-management behaviour and support among primary care COPD patients: cross-sectional analysis of data from the Birmingham Chronic Obstructive Pulmonary Disease Cohort

Characteristic

All those diagnosed with COPD (n = 1547)

Diagnosed with COPD and responded to 6-month questionnaire (n = 1078)

 

N (%)

N (%)

Age (years)

 Mean (SD)

69.2 (9.4)

69.8 (9.0)

Sex

 Male

952 (61.5%)

676 (62.7%)

 Female

595 (38.5%)

402 (37.3%)

Smoking status

 Current-smoker

402 (26.6%)

258 (24.3%)

 Former-smoker

867 (57.4%)

653 (61.5%)

 Never-smoker

242 (16.0%)

151 (14.2%)

Body mass index

 Underweight < 18.5

33 (2.1%)

23 (2.1%)

 Normal 18.5–25

387 (25.0%)

269 (25.0%)

 Overweight 25–30

566 (36.6%)

403 (37.4%)

 Obese > 30

561 (36.3%)

383 (35.5%)

Ethnicity

 White

1377 (97.0%)

997 (97.6%)

 Any other

43 (3.0%)

25 (2.4%)

Education

 No formal qualification

838 (61.2%)

597 (60.4%)

 GCSE/A-level

288 (21.0%)

202 (20.4%)

 Degree

93 (6.8%)

74 (7.5%)

 Other qualification

150 (11.0%)

115 (11.6%)

Employment status

 Paid/self-employed

245 (16.0%)

154 (14.4%)

 Not working

1286 (84.0%)

919 (85.6%)

Marital status

 Married/civil partner

805 (60.2%)

605 (62.1%)

 Never married/civil partner

101 (7.6%)

72 (7.4%)

 Widowed

230 (17.2%)

166 (17.0%)

 Divorced

177 (13.2%)

116 (11.9%)

 Separated

24 (1.8%)

16 (1.6%)

GOLD stagea

 FEV1/FVC ≥ 0.7

200 (13.7%)

128 (12.3%)

 1 (FEV1 ≥ 80% predicted)

308 (21.1%)

225 (21.6%)

 2 (50% ≤ FEV1 < 80% predicted)

652 (44.7%)

476 (45.8%)

 3 (30% ≤ FEV1 < 50% predicted)

253 (17.4%)

179 (17.2%)

 4 (FEV1 < 30% predicted)

45 (3.1%)

32 (3.1%)

Self-reported

 Co-morbidities at baseline

  Cancer

183 (12.3%)

134 (12.7%)

  Diabetes

227 (15.2%)

151 (14.3%)

  Hypertension

669 (44.8%)

481 (45.4%)

  Coronary heart disease

226 (15.1%)

159 (15.0%)

 Heart failure

110 (7.4%)

75 (7.1%)

 Asthma

611 (40.9%)

408 (38.5%)

 Depression

278 (18.6%)

174 (16.4%)

 MRC dyspnoea

  Grade 1–2

549 (38.1)

391 (37.1)

  Grade 3–5

893 (61.9)

662 (62.9)

 CAT

  Score; mean (SD)

20.0 (8.8)

19.3 (8.6)

 Living situation

  Alone

418 (29.0%)

302 (29.1%)

  Not alone

1021 (71.0%)

736 (70.9 %)

  1. NB: Where numbers do not add up to full cohort, values are missing. Percentages refer to the data available
  2. a GOLD classification severity based on airflow limitation post-bronchodilator (FEV1 forced expiratory volume during the first second) based on the European Community of Coal and Steel (ECCS) equations, SD standard deviation, CAT COPD Assessment Test, GOLD Global Initiative for Chronic Obstructive Lung Disease, GCSE General Certificate of Secondary Education
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