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Table 1 Patients’ characteristics according to their breathlessness status

From: Prevalence and management of chronic breathlessness in COPD in a tertiary care center

Patients’ characteristics Whole cohort
(N = 120)
Patients with severe breathlessness (mMRC ≥3) (N = 64) Patients with Chronic breathlessness
(N = 41)
Age (years) mean +/−SD 66 +/− 6 64 +/−4 64 +/− 4
Sex
 Male N (%) 69 (57%) 40 (62%) 26 (63%)
BMI (kg.m2) mean +/− SD 29 +/− 4 24 +/−2 25 +/−2
 BMI > 30 kg.m2 N (%) 52 (43%) 27 (42%) 14 (34%)
Smoking status
 Non smoker N (%) 2(2%) 2 (3%) 2 (5%)
 Former smoker N (%) 95 (79%) 47 (73%) 30 (73%)
 Current smoker N (%) 23 (19%) 15 (24%) 9 (22%)
Smoking (Pack/year) mean +/−SD 40 +/− 12 38+/−8 40+/− 11
FEV1 (% pred) mean +/− SD 47 +/− 13 29 +/− 15* 26 +/− 9*
GOLD spirometric grade
 1 N (%) 3 (3%) 1 (1%) 1(2%)
 2 N (%) 47 (39%) 16 (25%)* 5(12%)*
 3 N (%) 18 (15%) 5 (8%) 2 (5%)
 4 N (%) 52 (43%) 42 (66%)* 33(81%)*
Breathlessness: mMRC scale
 0 N (%) 3 (2%) 0 0
 1 N (%) 16 (13%) 0 0
 2 N (%) 37 (31%) 0 0
 3 N (%) 39 (32%) 39 (61%)* 18 (44%)*
 4 N (%) 25 (21%) 25 (39%)* 23 (56%)*
Frequent exacerbations (≥2/year) N (%) 49 (41%) 30 (47%) 20 (49%)
  1. BMI Body mass index, COPD Chronic obstructive pulmonary disease, FEV1 Forced expiratory volume in 1 s, GOLD Global initiative for obstructive lung disease, mMRC Modified Medical Research Council, data were expressed as mean +/− SD, * p ≤ 0.05, in comparison with the whole cohort