From: Utility of the CAT in the therapy assessment of COPD exacerbations in China
Variable | Total group | Sub group | P value |
---|---|---|---|
 | (n = 78) | (n = 39) |  |
Age, years | 69.01 ± 10.39 | 67.90 ± 11.02 | 0.56a |
Females, n (%) | 34(43.58) | 18(46.15) | 0.78b |
BMI, kg/m2 | 21.82 ± 4.02 | 21.06 ± 3.87 | 0.89a |
Smoking status, % | Â | Â | Â |
  Current smoker | 35.14 | 40.93 | 0.66b |
  Ex-smoker | 35.12 | 33.26 |  |
  Never smoked | 29.74 | 25.81 |  |
Smoking index, pack-years | 43.00 ± 26.00 | 41.00 ± 23.00 | 0.67a |
Comorbidities, n (%) | 33(49.25) | 18(46.15) | 0.69b |
Exacerbation frequency | 2.55 ± 1.44 | 2.58 ± 1.62 | 0.92a |
Education, years | 6.79 ± 5.17 | 6.51 ± 4.89 | 0.63a |
PaO2, mm Hg | 67.05 ± 18.90 | 67.80 ± 23.40 | 0.54a |
PaCO2, mm Hg | 44.48 ± 11.85 | 43.42 ± 15.08 | 0.31a |
Pulmonary function at exacerbation | Â | Â | Â |
FEV1, % predicted | 46.79 ± 19.14 | 45.37 ± 20.27 | 0.71a |
FEV1, L | 0.90 ± 0.33 | 0.82 ± 0.38 | 0.39a |
FVC, L | 1.57 ± 0.56 | 1.49 ± 0.57 | 0.44a |