Table 1.
Baseline demographic and clinical characteristics of participants.
| All (n = 113) | In-Lab PSG (n = 57) | Home PSG (n = 56) | P # | |
|---|---|---|---|---|
| Age, years—mean ± SD | 48.5 ± 13.6 | 49.0 ± 13.7 | 47.9 ± 13.7 | .7 |
| Sex, male—n (%) | 74 (65.5) | 37 (64.9) | 37 (66.1) | .9 |
| Race—n (%) | ||||
| White | 81 (71.7) | 43 (75.4) | 38 (67.9) | .5 |
| Asian | 29 (25.7) | 12 (21.1) | 17 (30.4) | |
| Other or missing | 3 (2.7) | 2 (3.5) | 1 (1.8) | |
| Body mass index, kg/m2—mean ± SD | 32.3 ± 8.5 | 32.4 ± 8.9 | 32.2 ± 8.0 | .9 |
| TST, minutes—mean ± SD | 367.8 ± 78.4 | 349.0 ± 9.3 | 386.9 ± 11.0 | .009 |
| Supine sleep, % of TST—mean ± SD | 41.7 ± 29.4 | 46.0 ± 29.9 | 37.4 ± 28.5 | .1 |
| Sleep efficiency, %—mean ± SD | 73.7 ± 15.0 | 75.5 ± 13.9 | 71.8 ± 16.0 | .2 |
| OSA—n (%) | 90 (79.7) | 46 (80.7) | 44 (78.6) | .04 |
| Mild OSA | 29 (25.7) | 17 (29.8) | 12 (21.4) | |
| Moderate OSA | 28 (24.8) | 8 (14.0) | 20 (35.7) | |
| Severe OSA | 33 (29.2) | 21 (36.8) | 12 (21.4) | |
| Minimum oxygen saturation, %—median (IQR) | 85 (78–88) | 86 (79–90) | 83 (77–87) | .5 |
| AHI, events/h—median (IQR) | 17.3 (7.3–34.1) | 15.5 (7.3–49) | 18.8 (7.2–27.6) | .1 |
| AHIS, events/h—median (IQR) | 29.1 (8.3–72.4) | 50.5 (7.5–77.8) | 25.0 (8.6–45.0) | .02 |
| n = 83* | n = 43* | n = 40* | ||
| AHINS, events/h—median (IQR) | 9.7 (1.5–28.1) | 11.4 (1.4–30.3) | 9.5 (2.0–20.5) | .5 |
| n = 83* | n = 43* | n = 40* | ||
| AHIS/AHINS ratio—median (IQR) | 2.1 (1.3–4.9) | 2.5 (1.4–5.4) | 1.9 (0.9–2.9) | .08 |
| n = 83* | n = 43* | n = 40* | ||
| spOSA proportion of OSA (%) | 38/63 (60.3) | 21/32 (65.6) | 17/31 (54.8) | .4 |
| n = 83* | n = 43* | n = 40* | ||
| siOSA proportion of OSA (%) | 9/63 (14.3) | 6/32 (18.8) | 3/31 (9.7) | .3 |
| n = 83* | n = 43* | n = 40* |
*Participants with ≥ 15 minutes of both supine and nonsupine sleep during PSG. #P-values for comparison between in-lab PSG and at-home PSG groups. AHI = apnea-hypopnea index, AHINS = nonsupine AHI, AHIN = supine AHI, IQR = interquartile range, OSA = obstructive sleep apnea, PSG = polysomnography, SD = standard deviation, siOSA = supine-isolated OSA, spOSA = supine-predominant OSA, TST = total sleep time.