Length of Individual Apnea Events Is Increased by Supine Position and Modulated by Severity of Obstructive Sleep Apnea
Table 1
The patient demographic data, median (range), in different OSA severity categories formed based on total AHI. Total analyzed time is denoted as TAT (min).
Normal
Mild
Moderate
Severe
Supine position
Nonsupine position
Supine position
Nonsupine position
Supine position
Nonsupine position
Supine position
Nonsupine position
Patients ( (females))
90 (12)
158 (23)
117 (13)
161 (12)
Age (years)
45 (26–67)
50 (28–75)
52 (33–81)
53 (21–81)
BMI (kg/m2)#
26.6 (21.1–41.8)
28.1 (19.9–44.6)
30.1 (21.2–53.7)
34.9 (21.1–55.8)
AHI total (events/h)#
2.6 (0.6–4.9)
9.4 (5.0–14.9)
21.3 (15.1–29.5)
50.2 (30.0–148.4)
AHI (events/h)
4.9 (0.7–24.6)
1.4 (0.3–5.1)
16.6 (3.6–65.7)
3.9 (0.5–20.4)
39.6 (2.7–77.9)
8.7 (0.4–30.8)
63.9 (16.4–179.6)
42.2 (0.9–125.5)
AI total (events/h)#
0.7 (0.2–4.1)
2.4 (0.2–12.6)
8.9 (0.4–24.6)
19.1 (0.3–81.6)
AI (events/h)
1.2 (0.2–22.7)
0.3 (0.1–3.1)
4.7 (0.2–45.1)
0.7 (0.1–9.2)
17.0 (0.4–67.3)
1.7 (0.2–14.8)
27.6 (0.3–86.0)
7.4 (0.1–73.0)
HI total (events/h)#
1.7 (0.2–4.6)
5.8 (0.4–13.9)
12.4 (1.0–25.2)
29.5 (1.6–115.2)
HI (events/h)
2.6 (0.2–16.6)
0.7 (0.1–3.7)
9.2 (0.7–54.9)
2.6 (0.1–20.1)
17.5 (1.3–72.3)
5.7 (0.2–30.3)
32.3 (0.4–167.7)
24.5 (0.4–102.5)
ODI total (events/h)#
2.1 (0.2–4.9)
7.3 (0.7–14.6)
18.0 (4.4–29.2)
47.6 (15.0–149.0)
ODI (events/h)
3.3 (0.2–17.5)
0.9 (0.1–3.5)
13.7 (0.7–65.7)
3.3 (0.2–20.4)
31.3 (2.7–77.9)
6.8 (0.2–29.7)
59.6 (14.2–187.3)
41.6 (0.4–120.8)
TAT (min)
159 (61–385)
294 (103–496)
147 (60–409)
275 (62–466)
163 (60–438)
259 (78–394)
192 (60–446)
225 (63–445)
, significant difference between events occurring in supine and nonsupine positions, Wilcoxon signed rank test. #, significant dependence on the severity of the OSA, Kruskal-Wallis test.
