Clinical and PSG Characteristics of Children with Mild OSA and Respiratory Events Terminated Predominantly with Arousal
Table 2
Characteristics of PSG parameters of children with mild OSA in two groups.
Arousal predominant n = 231
Nonarousal predominant n = 346
Z/t
value
TST, min
473.4 ± 50.7
470.1 ± 45.1
0.829
0.407
SE, %
86.9 ± 7.4
86.8 ± 8.0
0.251
0.802
N1, %
12.7 ± 4.2
10.6 ± 4.2
5.862
<0.001
N2, %
48.4 ± 6.4
47.7 ± 6.3
1.395
0.163
N3, %
20.5 ± 5.0
23.0 ± 5.9
−5.328
<0.001
R, %
18.3 ± 3.7
18.7 ± 3.7
−1.150
0.250
OAHI, h−1
2.0 (1.5, 3.1)
2.2 (1.4, 3.2)
−1.220
0.223
OAI, h−1
0 (0, 0.1)
0.1 (0, 0.2)
−4.779
<0.001
Mean, s
12.5 (10.6, 14.5)
13.0 (10.9, 16.0)
−0.942
0.346
Longest, s
12.8 (12.0, 14.5)
14.0 (11.5, 19.0)
−0.437
0.662
CAI, h−1
0.5 (0.2, 0.8)
1.2 (0.7, 1.9)
−11.405
<0.001
Mean, s
12.0 (11.0, 14.0)
12.0 (11.0, 13.0)
−2.425
0.015
Longest, s
15.5 (13.5, 17.0)
17.0 (15.0, 19.5)
−1.761
0.078
MAI, h−1
0 (0, 0.1)
0 (0, 0.1)
−3.626
<0.001
Mean, s
16.0 (14.0, 20.3)
15.8 (12.5, 19.0)
−1.756
0.079
Longest, s
18.0 (16.5, 22.0)
17.0 (13.6, 21.0)
−0.904
0.366
HI, h−1
1.9 (1.4, 2.9)
2.0 (1.3, 2.9)
−0.034
0.973
Mean, s
19.4 (17.0, 22.0)
19.0 (16.0, 22.8)
-1.593
0.111
Longest, s
39.0 (31.0, 50.0)
37.0 (29.0, 46.0)
−2.033
0.042
Fraction respiratory events
OA %
0 (0, 2.2)
0 (0, 4.7)
−4.088
<0.001
CA%
17.8 (7.7, 28.8)
36.4 (22.4, 50.0)
−10.305
<0.001
MA%
0 (0, 2.9)
0 (0, 4.6)
−2.812
<0.001
H %
76.9 (64.3, 88.5)
56.8 (44.4, 70.7)
−10.793
<0.001
ODI, h−1
0.3 (0.1, 0.5)
2.1 (1.3, 3.0)
−20.119
<0.001
∗ArI total, h−1
8.2 (6.7, 9.9)
7.3 (5.5, 9.0)
−4.684
<0.001
ArI-resp, h−1
2.1 (1.5, 2.9)
1.6 (1.1, 2.6)
−5.116
<0.001
Mean SpO2, %
98 (98, 98)
98 (97, 98)
−5.248
<0.001
SpO2 nadir, %
94 (93, 96)
91 (88, 93)
−14.888
<0.001
TST, total sleep time; SE, sleep efficiency; N1%, N2%, N3%, R%, percentage of NREM 1, 2, 3, and R sleep of TST; OAHI, obstructive apnea hypopnea index; OAI, obstructive apnea index; CAI, central apnea index; MAI, mixed apnea index; HI, hypopnea index; OAI%, CAI%, MAI%, HI%, fraction of respiratory events that were obstructive, central, mixed apnea or hypopnea; ODI, oxygen desaturation index; ArI total, total arousal index; ArI-resp, respiratory arousal index. Group was still an independent factor for the dependent variable after controlling for age and gender using a linear regression model.
