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Table 1 The demographic and clinical characteristics of all participants

From: Increased IFN-γ-producing Th17/Th1 cells and their association with lung function and current smoking status in patients with chronic obstructive pulmonary disease

No. of Subjects

Never-smokers

Smokers

Patients with COPD

n = 21

n = 31

n = 83

Age (years)

64.9 ± 6.5

63.7 ± 8.9

67.0 ± 8.4

Male/Female

19/0

29/2

79/4

Current/ex-smokers

0/0

27/4

36/47

smoking, pack-yrs

0

40 (23–78)

48 (31–109)

FEV1% predicted

93.5 ± 8.2

90.5 ± 6.4

49.3 ± 10.7

FEV1/FVC%

78.4 ± 5.1

72.9 ± 6.0

51.6 ± 9.3

Inhaled corticosteroid use

0

0

46

  1. Values are presented median (IQR) for smoking history, mean and standard deviation for age, FEV1% predicted and FEV1/FVC%, n for all others. COPD chronic obstructive pulmonary disease, FEV1 forced expiratory volume in 1 s, FVC forced vital capacity