Table 1 Demographic and clinical characteristics of the patients

Sex (male/female, n)

105 (65/40)

56 (27/15)

49 (28/13)

0.347

Age (year)

7 (6–7)

7(6–7)

7 (6–8)

0.882

Course of snoring (months)

19 (16–22)

27(22–31)

10 (8–13)

< 0.001^**

Course of mouth breathing (months)

15 (12–18)

19 (14–23)

10 (7–13)

0.001^**

Course of choking (months)

8 (6–11)

13 (9–18)

2 (1–3)

< 0.001^**

Father’s education level (n)

0.241

  1

4

3

1

  2

7

3

4

  3

31

20

11

  4

30

14

16

  5

32

16

16

  6

1

0

1

Maternal education level (n)

0.586

  1

4

3

1

  2

9

4

5

  3

30

19

11

  4

31

13

18

  5

26

14

12

  6

5

3

2

BMI (kg/m²)

17.2 (16.5–17.8)

17.4 (16.5–18.2)

16.9 (15.9–17.9)

0.266

A/N ratio

0.67 ± 0.10

0.70 ± 0.10

0.62 ± 0.08

< 0.001^**

Tonsil size (n)

< 0.001^**

  1

19

5

14

  2

48

23

25

  3

38

28

10

AHI

4.9 (2.9–6.8)

8.0 (4.5–11.4)

1.3 (1.2–1.6)

< 0.001^**

OAI

3.6 (1.7–5.5)

3.4 (0.8–5.9)

0.2 (0.1–0.3)

< 0.001^**

OAHI

1.9 (0.5–3.2)

6.3 (2.9–9.8)

0.4 (0.3–0.4)

< 0.001^**

Minimum SaO₂

88.7 (87.8–89.6)

87.5 (86.0–88.9)

90.1 (89.4–90.8)

0.001^**

RAI

0.97 (0.51–1.4)

1.70 (0.87–2.54)

0.13 (0.10–0.17)

< 0.001

VIQ

101.21 ± 12.21

98.68 ± 12.87

104.10 ± 10.81

0.022^*

PIQ

99.00 ± 11.90

96.41 ± 12.52

101.96 ± 10.51

0.016^*

FIQ

96.92 ± 13.13

94.95 ± 13.70

99.18 ± 12.19

0.099