Table 2 Controls’ characteristics at baseline and after 6 months

Age (years)^a

33.7 ± 6.0

–

Female sex^a

22 (84.6)

–

BMI (kg/m²)

23.1 ± 5.1

23.2 ± 5.1

Smoking (pack-years)^a

54.3 ± 26.7

–

Exhaled CO

3.5 ± 2.2

3.7 ± 1.9

Serum leptin (ng/ml)

2.1 ± 1.4

2.1 ± 1.4

Serum adiponectin (μg/ml)

1.5 ± 1.3

1.5 ± 1.2

CRP (mg/dl)

0.06 ± 0.06

0.05 ± 0.05