Table 2. General characteristics of enrolled patients

		No. (%) (n=52)	AHI (SD)	p-value
Age† (yr)
2-5		7 (13.5)	1.6 (0.7)	0.21
6-10		41 (78.8)	3.7 (8.5)
≥11		4 (7.7)	11.6 (20.1)
Sex‡
Male		29 (55.8)	5.3 (12.1 )	0.02*
Female		23 (54.2)	2.4 (3.0)
Allergic rhinitis‡
Combined		11 (21.2)	1.6 (1.4)	0.09
Not combined		41 (78.8)	4.7 (10.6)
BMI‡
Normal		33 (63.5)	3.1 (8.5)	0.29
Overweight&obesity		19 (36.6)	5.5 (10.6)
Tonsil grade‡
0		2 (3.8)	1.4 (0.9)	<0.01*
1		5 (9.6)
2		20 (38.5)
3		21 (40.4)	6.8 (12.9)
4		4 (7.7)
AHI
Normal		13 (25.0)
Mild		34 (65.4)
Moderate		1 (1.9)
Severe		4 (7.7)
Grading system
Parikh grading†
1		2 (3.8)	21.4 (28.8)	0.02*
2		5 (9.6)	7.1 (11.6)
3		27 (51.9)	4.0 (9.3)
4		18 (34.6)	1.2 (0.9)
ACE grading
A†	0	0 (0)	-	<0.01*
	1	3 (5.8)	23.5 (20.7)
	2	9 (17.3)	2.8 (2.9)
	3	12 (23.1)	5.2 (13.6)
	4	28 (53.8)	1.8 (2.3)
C†	0	2 (3.8)	34.7 (9.9)	<0.01*
	1	8 (15.4)	2.6 (3.0)
	2	42 (80.8)	2.8 (7.5)
E‡	0	17 (32.7)	8.2 (14.3)	0.10
	1	35 (67.3)	2.0 (4.6)

p<0.05
Statistical significances were tested by Oneway analysis of variances among groups
Statistical significances were tested by t-test. AHI apnea-hypopnea index, BMI : body mass index