Table 1. Patients characteristics.

	Controls	CRSwNP
No. of patients	15	15
No. (female/male)	5/10	4/11
Age (y), mean (range)	29. 5 (18–35)	37.6 (17–40)
Asthma history	0	0
Skin test result	Negative	Negative
Smoking	2/15	3/15
No. of sinus surgery	0	0
SNOT-20 score*	2.5 ± 1.6	27.9 ± 2.5
CT grade*	0	17.8 ± 2.3
Endoscopy score *	0	8.5 ± 0.9
Total inflammatory cells*	11.7 ± 5.8	77.5 ± 8.8
Eosinophils*	1.0 ± 0.2	4.9 ± 1.5
Mononuclear cells*	15.5 ± 6.9	45.3 ± 12.1
No. of Polyp		15
Eosinophilic		1
Non-eosinophilic		14

SNOT-20, 20-item Sino-Nasal Outcome Test.

*The data of CRSwNP are significantly higher than those of controls.