Table 2.
Sleep study results for participants (n = 30).
| PSG | LSAT | P a | HSAT | Pb | |
|---|---|---|---|---|---|
| Sleep architecture | |||||
| TST (min) | 367.3 (285.5–384.0) | ||||
| Total analysis time | 439.4 (40.2) | 447.6 (97.3) | |||
| Sleep efficiency (%) | 84.5 (76.0–89.0) | ||||
| WASO (min) | 50.5 (24.0–112.0) | ||||
| Sleep changes | 121.5 (101.0–144.0) | ||||
| Stage N1 sleep (% TST) | 11.4 (7.9–13.7) | ||||
| Stage N2 sleep (% TST) | 42.1 (38.9–49.5) | ||||
| Stage N3 sleep (% TST) | 30.5 (12.5) | ||||
| REM sleep (% TST) | 11.6 (6.6) | ||||
| Supine position (% TST) | 74.4 (31.0–100.0) | 77.3 (32.4–100.0) | .94 | 59.2 (23.0–99.9) | .41 |
| Total arousal index (events/h) | 41.0 (16.6) | ||||
| Respiratory arousal index (events/h) | 19.1 (15.6–34.8) | ||||
| Periodic limb movement arousal index (events/h) | 0.4 (0.0–3.0) | ||||
| Periodic limb movement sleep index (events/h) | 3.3 (0.0–12.8) | ||||
| OSA variables | |||||
| AHI (events/h) | 24.5 (11.6–38.8) | 13.5 (4.3–24.5) | .011 | 11.6 (4.8–19.6) | .007 |
| Participants with AHI ≥ 5 events/h, n (%) | 28 (93.3) | 22 (73.3) | .038 | 22 (73.3) | .038 |
| Participants with AHI ≥ 15 events/h, n (%) | 22 (73.3) | 14 (46.7) | .035 | 12 (40.0) | .009 |
| Participants with AHI ≥ 30 events/h, n (%) | 13 (43.3) | 4 (13.3) | .010 | 6 (20.0) | .052 |
| Central apnea index (events/h) | 0.4 (0.0–1.2) | 0.9 (0.3, 2.6) | .017 | 0.9 (0.4, 2.6) | .029 |
| Obstructive apnea index (events/h) | 0.4 (0.0–1.9) | 0.1 (0.0–2.2) | .65 | 0.3 (0.0–2.2) | .78 |
| Hypopnea index (events/h) | 21.6 (11.6–31.1) | 12.7 (2.8–17.9) | .003 | 8.8 (4.7–16.8) | < .001 |
| RDI (events/h) | 29.5 (23.4–46.0) | 26.5 (12.1–37.1) | .055 | 22.4 (14.0–34.0) | .04 |
| Supine RDI (events/h) | 35.6 (24.9–50.3) | 30.4 (14.5–38.0) | .021 | 23.5 (15.9–34.0) | .005 |
| Nonsupine RDI (events/h) | 13.6 (0.0–25.1) | 5.8 (0.0–14.5) | .24 | 10.7 (0.0–19.7) | .93 |
| ODI (events/h) | 11.3 (4.0–23.8) | 13.0 (3.3–21.0) | .80 | 9.2 (4.3–18.4) | .88 |
| NREM sleep RDI (events/h) | 28.1 (21.7–43.7) | ||||
| REM sleep RDI (events/h) | 34.6 (19.6–65.5) | ||||
| Mean SpO2 (%) | 94.0 (92.0–95.0) | 94.0 (91.0–96.0) | .87 | 94.5 (93.0–95.0) | .47 |
| Minimum SpO2 (%) | 87.5 (82.0–91.0) | 85.5 (81.0–89.0) | .23 | 85.0 (77.0–89.0) | .14 |
| T90 ≥ 5 consecutive min (n) | 4 | 7 | .50 | 5 | .99 |
Values are reported as mean (SD) for normally distributed continuous variables and median (interquartile range, Q1–Q3) for nonnormally distributed continuous variables unless otherwise stated. A Mann-Whitney U test was used for nonnormally distributed data and a chi-square test was used for category variables. aBetween LSAT and PSG. bBetween HSAT and PSG. AHI = apnea-hypopnea index, HSAT = home sleep apnea testing, LSAT = laboratory sleep apnea testing, NREM = nonrapid eye movement, ODI = oxygen desaturation index, OSA = obstructive sleep apnea, PSG = polysomnography, RDI = respiratory disturbance index, REM = rapid eye movement, SpO2 = oxygen saturation, T90 = time with SpO2 below 90%, TST = total sleep time.