Current smokers | |||||
---|---|---|---|---|---|
Cluster 1 | Cluster 2 | Cluster 3 | Cluster 4 | P value | |
Total WBC count (N/μl) | 7153 (2291) | 7353 (2527) | 7110 (1954) | 7073 (2123) | 0.924 |
Baseline CAT score | 13.17 (7.95) | 16.45 (9.54) | 13.78 (7.86) | 20.06 (7.86) | < 0.0001 |
BMI (kg/m2) | 27.63 (4.7) | 31.1 (5.04) | 25.58 (4.76) | 23.65 (4.26) | < 0.0001 |
Exacerbations | |||||
Severe | 0.2 (0.6) | 0.44 (1.62) | 0.31 (0.82) | 1.25 (2.27) | < 0.0001 |
Total | 0.49 (1.19) | 1.09 (3.39) | 0.92 (2.14) | 2.09 (2.91) | < 0.0001 |
Total at baseline | 0.25 (0.68) | 0.58 (1.39) | 0.22 (0.63) | 0.62 (0.99) | 0.011 |
Oxygen desaturation with 6-min walk (%) | 14 | 36 | 14 | 41 | < 0.0001 |
Post-bronchodilator values (FEV1/FVC × 100) | 74 (9) | 68 (13) | 63 (11) | 44 (12) | < 0.0001 |
Former smokers | |||||
Total WBC count (N/μl) | 6204 (1595) | 6773 (1954) | 6907.27 (1722) | 7330.24 (2155) | 0.005 |
Baseline CAT score | 9.36 (6.19) | 10.73 (6.61) | 10.96 (6.38) | 17.06 (7.33) | < 0.0001 |
BMI (kg/m2) | 28.67 (4.43) | 30.76 (4.55) | 28.49 (4.60) | 25.68 (4.44) | < 0.0001 |
Exacerbations | |||||
Severe | 0.08 (0.34) | 0.25 (1.11) | 0.23 (0.70) | 0.84 (1.61) | < 0.0001 |
Total | 0.44 (0.96) | 0.81 (1.78) | 0.94 (1.52) | 2.56 (3.09) | < 0.0001 |
Total at baseline | 0.16 (0.44) | 0.32 (0.87) | 0.21 (0.53) | 0.66 (0.92) | < 0.0001 |
Oxygen desaturation with 6-min walk (%) | 18 | 17 | 37 | 76 | < 0.0001 |
Post-bronchodilator values (FEV1/FVC × 100) | 72 (10) | 71 (9) | 53 (11) | 34 (12) | < 0.0001 |