Table 1 Characteristics of subjects for each device.
From: Detection of sleep apnea using smartphone-embedded inertial measurement unit
Amue link | Xperia | iPhone | |
|---|---|---|---|
Number of subjects | 46 | 46 | 34 |
Age (years) | 45 (33–56) | 48 (42–62) | 45 (33–53) |
Female, n (%) | 6 (14%) | 4 (9%) | 9 (26%) |
BMI (kg/m2) | 26.2 (23.2–30.4) | 26.6 (23.3–30.4) | 24.6 (21.6–27.3) |
Polysomnography | |||
TRT (min) | 512 (470–530) | 528 (494–553) | 522 (487–549) |
TST (min) | 404 (337–438) | 401 (346–431) | 387 (303–444) |
Sleep efficiency (%) | 84.5 (78.2–87.5) | 82.5 (76.5–89.3) | 85.4 (78.6–92.0) |
Sleep latency (min) | 33.3 (16.0–55.5) | 27.8 (13.0–61.0) | 25.0 (10.5–50.0) |
WASO (min) | 28.5 (21.5–45.0) | 40.8 (27.5–59.5) | 36.5 (25.0–54.5) |
Sleep stage | |||
N1 (%) | 21 (14–35) | 25 (14–37) | 20 (13–32) |
N2 (%) | 50 (39–59) | 49 (39–56) | 52 (43–61) |
N3 (%) | 12 (5–21) | 7 (3–18) | 12 (4–21) |
REM (%) | 11 (4–19) | 11 (5–20) | 9 (1–19) |
Respiratory rate (cpm) | 14.1 (12.9–16.1) | 14.6 (13.8–16.5) | 14.5 (13.1–15.4) |
AHI | 15.2 (8.5–35.3) | 24.0 (10.4–45.0) | 12.01(5.0–35.0) |
OAI | 3.5 (1.2–7.2) | 6.6 (1.2–17.7) | 3.2 (0.7–6.1) |
CAI | 0.4 (0.2–1.8) | 0.9 (0.2–3.6) | 0.6 (0.2–1.6) |
MAI | 0.2 (0.1–0.8) | 0.4 (0.1–2.3) | 0.4 (0.0–1.1) |
HI | 9.8 (4.0–19.2) | 12.1 (7.1–20.4) | 8.8 (3.2–15.1) |
AHI | |||
< 5 | 8 (17%) | 5 (22%) | 9 (26%) |
5–15 | 14 (30%) | 10 (22%) | 9 (26%) |
15–30 | 9 (20%) | 13 (28%) | 6 (18%) |
≥ 30 | 15 (33%) | 18 (38%) | 10 (30%) |
