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Table 1 Baseline characteristics of patients

From: The cutoff point of clinical chronic obstructive pulmonary disease questionnaire for more symptomatic patients

Characteristics N = 126
Age (years) 68.83 ± 7.23
Sex: Male 123 (97.62)
BMI (kg/m2) 22.97 ± 3.27
Smoking status
 Ex-smoker 88 (69.84)
 Current smoker 38 (30.16)
 Packs per/year 54.47 ± 64.46
History of exacerbations in the past year
 Unplanned visit to an outpatient clinic (no./year) 2.05 ± 2.01
 Unplanned visit to an emergency department or hospital admission (no./year) 1.4 ± 0.52
  ≥ 2 events in the past year (n, %) 17 (13.49)
FEV1 (L) 1.65 ± 0.53
FEV1 (%) 65.35 ± 19.42
FVC (L) 3.59 ± 0.79
FVC (%) 97.15 ± 17.10
FEV1/FVC 45.95 ± 11.55
GOLD stage
 1 (FEV1 > 80% predicted) 23 (18.25)
 2 (FEV1 50%–79% predicted) 76 (60.32)
 3 (FEV1 30%–49% predicted) 23 (18.25)
 4 (FEV1 < 30% predicted) 4 (3.17)
SGRQ score 38.04 ± 18.18
CAT score 17.76 ± 7.68
mMRC dyspnea score 1.44 ± 0.92
CCQ score 2.03 ± 0.94
6MWT (m) 444.39 ± 103.85
  1. Data are presented as mean ± standard deviation or n (%)
  2. Abbreviations: BMI body mass index, CAT Chronic Obstructive Pulmonary Disease Assessment Test, CCQ Clinical Chronic Obstructive Pulmonary Disease Questionnaire, FEV1 forced expiratory volume in 1 s, FVC forced vital capacity, GOLD Global Initiative for Chronic Obstructive Lung Disease, mMRC modified Medical Research Council, SGRQ St. George’s Respiratory Disease Questionnaire, 6MWT 6-min walk test