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Table 1 Study population, basic characteristics in 2005, comparing non-COPD and COPD

From: Proteolytic biomarkers are related to prognosis in COPD- report from a population-based cohort

 

Non-COPD

n = 948

COPD

n = 594

P

Female, n (%)

447 (47)

248 (42)

0.038

Age (years), median (IQR)

67 (55–71)

69 (57–71)

0.015

BMI (kg/m2), median (IQR)

27 (24–30)

26 (24–29)

< 0.001

Non-smoker, n (%)

443 (47)

149 (25)

< 0.001

Ex-smoker, n (%)

384 (41)

247 (42)

0.676

Current smoker, n (%)

120 (13)

197 (33)

< 0.001

Pack years, median (IQR)

0.8 (0–12)

14 (0–27)

< 0.001

FEV1% predicted, median (IQR)

1.03 (0.93–1.13)

0.85 (0.73–0.96)

< 0.001

Productive cough, n (%)

212 (22)

238 (40)

< 0.001

Heart disease, n (%)

149 (16)

111 (19)

1.000

  1. IQR Inter quartile range. Significant p-values in bold