Recent quitter (n = 126)

Remote quitter (n = 180)

p value

Predicted FEV1

3.32 ± 0.06

3.33 ± 0.21

0.685

Actual FEV1

2.87 ± 0.60

3.12 ± 0.76

0.225

Functional defect of FEV1

0.97 ± 0.94

0.89 ± 0.87

0.804

Predicted FVC

4.18 ± 0.27

4.16 ± 0.28

0.837

Actual FVC

3.42 ± 0.60

3.71 ± 0.66

0.120

Functional defect of FVC

0.79 ± 0.45

0.69 ± 0.21

0.416

Predicted FEV1/FVC

79.29 ± 4.76

79.93 ± 3.87

0.595

Actual FEV1/FVC

82.71 ± 9.54

83.17 ± 10.22

0.874

Functional defect of FEV1/FVC

0.09 ± 0.04

0.13 ± 0.07

0.238

Predicted PEFR

9.67 ± 0.45

9.86 ± 0.64

0.245

Actual PEFR

6.86 ± 2.80

7.35 ± 2.58

0.519

FFD of PEFR

3.32 ± 2.42

2.95 ± 2.00

0.576

Predicted TLC

5.29 ± 0.29

5.16 ± 0.58

0.337

Actual TLC

4.33 ± 0.68

4.70 ± 0.77

0.090

FFD of TLC

1.08 ± 0.69

0.86 ± 0.28

0.201

CO exhaled level

1.52 ± 0.60

1.57 ± 0.97

0.858

SpO₂

96.52 ± 1.17

96.70 ± 1.06

0.577