Table 1 Demographic and clinical characteristics by weight status.

From: Correlations between obstructive sleep apnea and adenotonsillar hypertrophy in children of different weight status

Variable

Underweight

(n = 62)

Normal-weight

(n = 273)

Overweight

(n = 52)

Obese

(n = 64)

P-value

Age, years

5.16 ± 1.77

5.56 ± 2.40

5.81 ± 2.74

5.69 ± 2.45

0.476

Gender, male (No. %)

42 (67.74)

186 (68.13)

33 (63.46)

54 (84.38)

0.063

BMI, kg/m2

12.94 ± 0.91d

15.58 ± 1.21c

18.41 ± 1.85b

20.94 ± 2.56a

<0.001

A/N ratio

0.69 ± 0.11a

0.65 ± 0.10b

0.67 ± 0.08a,b

0.66 ± 0.09a,b

0.034

Tonsil size

6.52 ± 1.41

6.66 ± 1.26

6.79 ± 1.11

6.83 ± 1.28

0.498

TST, min

492.27 ± 53.67

477.86 ± 52.25

464.71 ± 59.99

473.69 ± 71.65

0.067

Sleep efficiency, %

90.97 ± 6.87

89.54 ± 7.96

88.01 ± 8.26

87.41 ± 9.97

0.059

N1, %

12.91 ± 6.45

14.94 ± 9.70

14.10 ± 7.67

14.98 ± 8.65

0.411

N2, %

40.00 ± 10.22

40.25 ± 10.50

40.41 ± 9.26

40.99 ± 9.49

0.949

N3, %

29.47 ± 8.54

26.79 ± 8.02

29.26 ± 7.33

27.33 ± 8.35

0.040

REM, %

17.63 ± 5.28

17.90 ± 5.60

16.23 ± 4.67

16.71 ± 4.32

0.111

Awakenings

12.60 ± 8.68

13.92 ± 9.86

14.35 ± 9.79

14.28 ± 8.68

0.716

Total arousal index, h TST

11.99 ± 8.92

11.63 ± 5.81

12.34 ± 6.80

13.30 ± 9.81

0.392

Respiratory arousal index, h TST

3.51 ± 5.29

2.85 ± 3.90

3.86 ± 5.21

4.44 ± 6.24

0.047

AHI

17.03 ± 18.51b

13.53 ± 14.90b

15.94 ± 18.65b

25.75 ± 25.18a

<0.001

Apnea index, h TST

7.09 ± 12.60a,b

5.38 ± 9.11b

7.00 ± 12.06a,b

9.42 ± 12.61a

0.043

Hypopnea index, h TST

9.94 ± 10.92b

8.15 ± 8.82b

8.94 ± 10.02b

16.34 ± 17.82a

<0.001

Obstructive AHI, h TST

5.69 ± 10.56a,b

4.21 ± 8.45b

5.89 ± 11.61a,b

8.13 ± 11.82a

0.029

Minimal SaO2, %

73.23 ± 14.25

74.84 ± 12.96

76.15 ± 13.26

71.19 ± 14.68

0.155

Mean oxygen saturation, %

94.82 ± 4.08

95.73 ± 1.71

95.38 ± 2.90

95.08 ± 2.88

0.031

Desaturation index, h TST

17.90 ± 19.38b

14.92 ± 15.32b

18.01 ± 18.65b

30.41 ± 28.06a

<0.001

  1. The values are means ± standard deviations. Gender is expressed as frequencies with percentages. A/N ratio, adenoidal/nasopharyngeal ratio; TST, total sleep time; N, no rapid eye movement; REM, rapid eye movement; AHI, apnea-hypopnea index. Means with different lower case letters represent a statistically significant difference within each different groups (P < 0.05).
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