Table 5.

Comparison of biomarkers between respondent types

	Subject	Control	p-value
FEV1
Range	0.88–4.21	1.49–4.02
Mean ± SD	2.35 ± 0.73	2.69 ± 0.56	0.06
PEFR
Range	104.00–618.00	156.00–650
Mean ± SD	253.72 ± 103.45	330.02 ± 94.61	0.000
COHb (%)
Range	5.00–20.00	1.00–18.00
Mean ± SD	13.28 ± 3.91	8.50 ± 3.68	0.000
BMI (kg/m2)
Range	16.22–26.03	18.03–35.06
Mean ± SD	21.97 ± 2.19	23.36 ± 3.74	0.019