Table 3 Detailed characteristics in COPD patients with discordant group assignments when divided into CAT⩾10/mMRC 0–1 and CAT<10/mMRC⩾2 subgroups

From: Features of COPD patients by comparing CAT with mMRC: a retrospective, cross-sectional study

 

CAT ⩾ 10/mMRC 0–1 (n=83)

CAT<10/mMRC ⩾ 2 (n=206)

P value

Agea

71.7±10.2

72.5±9.2

0.485

Gender b

  

0.362

 Male

78 (94.0%)

200 (97.1%)

 

 Female

5 (6.0%)

6 (2.9%)

 

Smoking b

  

0.132

 Never

8 (9.6%)

15 (7.3%)

 

 Ex-smoker

43 (51.8%)

133 (64.6%)

 

 Current smoker

32 (38.6%)

58 (28.2%)

 

BMIa

23.5±3.5

23.4±3.9

0.846

Wheezing b

  

0.008*

 Presence

45 (54.2%)

75 (36.4%)

 

 Absence

38 (45.8%)

131 (63.6%)

 

Spirometry (post- bronchodilator test)

 FEV1/FVC (%)a

56.4±10.2

55.9±8.3

0.717

 FEV1 (L)a

1.3±0.5

1.3±0.5

0.711

 FVC (L)a

2.3±0.6

2.3±0.6

0.713

 FEV1% predicteda

55.7±21.9

57.4±20.3

0.535

Bronchodilator tests b

  

1.000

 Positive

24 (28.9%)

61 (29.6%)

 

 Negative

59 (71.1%)

145 (70.4%)

 

CAT scoresa

13.8±4.2

5.5±3.0

0.000*

mMRCa

1.0±0.3

2.2±0.5

0.000*

Exacerbation numbers in the previous yeara

0.7±1.1

0.5±1.2

0.345

Co-morbidities

 Cardiovascular diseaseb,c

23 (27.7%)

53 (25.7%)

0.842

 Chronic lung diseaseb,d

4 (4.8%)

19 (9.2%)

0.241

 Lung cancerb

3 (3.6%)

2 (1.0%)

0.145

  1. Abbreviations: BMI, body mass index; CAT, COPD assessment test; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; mMRC, modified Medical Research Council dyspnoea scale.
  2. a By independent t-test.
  3. b By chi-square test.
  4. c Cardiovascular disease included ischaemic heart disease, heart failure, atrial fibrillation and hypertension.
  5. d Chronic lung disease included previous pulmonary tuberculosis, bronchiectasis and pneumoconiosis.
  6. *P<0.05.
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