| Mild quitter (n = 258) | Moderate quitter (n = 36) | Heavy quitter (n = 12) | p value |
Predicted FEV1 | 3.36 ± 0.14 | 3.20 ± 0.09 | 2.90 ± 0.00 | 0.015 |
Actual FEV1 | 3.23 ± 0.52 | 1.93 ± 0.18 | 1.58 ± 0.00 | 0.006 |
Functional defect of FEV1 | 0.81 ± 1.00 | 1.27 ± 0.19 | 1.32 ± 0.00 | 0.008 |
Predicted FVC | 4.20 ± 0.19 | 4.11 ± 0.53 | 3.52 ± 0.00 | 0.125 |
Actual FVC | 3.74 ± 0.57 | 2.82 ± 0.32 | 2.64 ± 0.00 | 0.025 |
Functional defect of FVC | 0.67 ± 0.32 | 1.08 ± 0.29 | 0.88 ± 0.00 | 0.241 |
Predicted FEV1/FVC | 79.79 ± 3.66 | 78.00 ± 7.75 | 82.00 ± 0.00 | 0.231 |
Actual FEV1/FVC | 86.19 ± 6.72 | 67.67 ± 3.14 | 60.00 ± 0.00 | 0.352 |
Functional defect of FEV1/FVC | 0.08 ± 0.03 | 0.11 ± 0.05 | 0.22 ± 0.00 | 0.452 |
Predicted PEFR | 9.89 ± 0.47 | 9.56 ± 0.46 | 8.15 ± 0.00 | 0.235 |
Actual PEFR | 7.92 ± 2.09 | 3.12 ± 0.91 | 2.60 ± 0.00 | 0.041 |
FFD of PEFR | 2.41 ± 1.72 | 6.44 ± 0.64 | 5.55 ± 0.00 | 0.052 |
Predicted TLC | 5.30 ± 0.22 | 4.84 ± 1.20 | 4.40 ± 0.00 | 0.325 |
Actual TLC | 4.71 ± 0.68 | 3.81 ± 0.48 | 3.30 ± 0.00 | 0.365 |
FFD of TLC | 0.83 ± 0.41 | 2.02 ± 0.14 | 1.10 ± 0.00 | 0.918 |
CO exhaled level | 1.58 ± 0.88 | 1.50 ± 0.55 | 1.00 ± 0.00 | 0.852 |
SpO2 | 96.72 ± 1.03 | 96.83 ± 0.41 | 94.00 ± 0.00 | 0.933 |