Table 1 Demographic, anthropometric and pulmonary function parameters of participants

  < 35 years old

162 (53.1%)

7.76 ± 1.95

0.52

7.60 ± 2.05

0.86

5.16 ± 0.43

0.49

10.72 ± 0.35

0.31

17.6 ± 6.70

0.14

  ≥ 35 years old

143 (46.9%)

7.75 ± 1.37

8.40 ± 2.20

5.25 ± 0.83

11.7 ± 1.65

21.4 ± 9.96

 Male

290 (95.1%)

7.7 ± 1.63

0.63

8.01 ± 2.06

0.56

5.3 ± 0.60

0.81

10.97 ± 0.98

0.87

19.76 ± 8.42

0.46

 Female

15 (4.9%)

9 ± 2.6

7.04 ± 3.26

2.8 ± 0.93

15.25 ± 0.53

13.75 ± 8.66

  ≤ 25

158 (51.8%)

8.3 ± 0.98

0.10

8.06 ± 1.72

0.37

5.12 ± 0.94

0.26

12.66 ± 0.16

0.06

18.22 ± 6.95

0.23

  > 25

147 (48.2%)

7.05 ± 2.43

7.23 ± 2.55

5.27 ± 0.27

9.25 ± 2.18

20.08 ± 9.60

 Yes

43 (14.1%)

7.9 ± 1.4

0.005

9.95 ± 1.20

0.003

6.20 ± 0.35

0.70

14.4 ± 0.82

0.30

33.20 ± 10.60

0.40

 No

262 (85.9%)

7.62 ± 2.20

7.5 ± 2.70

5.03 ± 0.66

10.60 ± 1.25

16.30 ± 7.85

 Yes

45 (14.8%)

8.40 ± 1.90

0.86

8.50 ± 1.90

0.84

5.60 ± 0.73

0.058

12.50 ± 0.50

0.75

16.30 ± 6.20

0.45

No

260 (85.2%)

7.70 ± 1.65

7.90 ± 2.15

5.10 ± 0.85

11 ± 10.4

20.02 ± 8.06