Table 3.
Respiratory characteristics obtained by 1-night polysomnography.
| Entire Cohort (n = 74) | PRS (n = 31) | AWO (n = 43) | P | |
|---|---|---|---|---|
| OAHI, events/h | 14.5 [7.4–25.9] | 16.8 [10–35.1] | 12.4 [7.2–22.1] | .124 |
| OAHI ≥ 1 and < 5 events/h, n (%) | 12 (16.2%) | 5 (16.1%) | 7 (16.3%) | |
| OAHI ≥ 5 and < 10 events/h, n (%) | 15 (20.3%) | 3 (9.7%) | 12 (27.9%) | |
| OAHI ≥ 10 events/h, n (%) | 47 (63.5%) | 23 (74.2%) | 24 (55.8%) | |
| OAHI REM, events/h | 22.9 [11.2–46.5] | 27.6 [12.3–54.1] | 20.8 [11.1–43.2] | .226 |
| OAHI NREM, events/h | 7.8 [3.6–12.8] | 12.4 [5.9–20.3] | 5.5 [3.3–10.7] | .019 |
| OAI, events/h | 8.9 [3.8–19.2] | 10.2 [4.4–25.5] | 7.8 [3.4–15.7] | .230 |
| OAI REM, events/h | 10.1 [3.8–20.9] | 17.1 [5.4–26.9] | 8.3 [3.8–16.4] | .082 |
| OAI NREM, events/h | 4 [1.2–9.2] | 5.1 [1.6–17.9] | 3.1 [1–5.2] | .078 |
| OHI, events/h | 0.8 [0–5.4] | 0.6 [0–5.8] | 0.8 [0–4.6] | .591 |
| OHI REM, events/h | 1.3 [0–11.2] | 0 [0–12.1] | 1.9 [0–9.4] | .600 |
| OHI NREM, events/h | 0 [0–2.2] | 0 [0–3.9] | 0.1 [0–1.8] | .777 |
| CAI, events/h | 0 [0–0.8] | 0 [0–0] | 0.4 [0–1.7] | <.001 |
| CAI REM, events/h | 0 [0–1.1] | 0 [0–0] | 0.6 [0–3.2] | <.001 |
| CAI NREM, events/h | 0 [0–0.5] | 0 [0–0] | 0 [0–0.9] | .006 |
| MAI, events/h | 0.7 [0–1.9] | 0 [0–0.7] | 1.3 [0–2.3] | <.001 |
| MAI REM, events/h | 0.5 [0–3.2] | 0 [0–0] | 2.5 [0–4] | <.001 |
| MAI NREM, events/h | 0 [0–1] | 0 [0–0.5] | 0.5 [0–1.3] | .049 |
| Mean O2% | 97.4 [96.5–98.1] | 97.4 [97–98] | 97.4 [96.2–98.1] | .822 |
| Time with O2 < 90%, % | 0.1 [0–1] | 0.1 [0–0.6] | 0.1 [0–1.1] | .647 |
| ODI3%, events/h | 16.4 [7.2–30.3] | 15.9 [7.4–26.7] | 16.6 [7–34.8] | .767 |
| ODI4%, events/h | 7.9 [2.9–18.1] | 8.8 [3–17.5] | 7.3 [2.8–17.8] | .974 |
| Mean PtcCO2, mmHg | 41.1 [38.3–44.9] | 44 [40.2–46.4] | 40.1 [37.5–43.9] | .010 |
| Maximum PtcCO2, mmHg | 45 [36.7–65.5] | 47.5 [43.5–49.8] | 43.9 [36.6–63.7] | .016 |
| Time spent with PtcCO2 > 50 mmHg, % | 0 [0–0] | 0 [0–2.5] | 0 [0–0] | .445 |
Data were not available for 4 patients (see Methods). Data are expressed as number and percentage or median and interquartile range. P values < .001 were considered statistically significant. AWO = isolated airway obstruction, CAI = central apnea index, MAI = mixed apnea index, NREM = non–rapid eye movement, OAHI = obstructive apnea-hypopnea index, OAI = obstructive apnea index, ODI3% = oxygen desaturation index ≥ 3%, ODI4% = oxygen desaturation index ≥ 4%, OHI = obstructive hypopnea index, PRS = Pierre Robin sequence, PtcCO2, transcutaneous carbon dioxide pressure, REM = rapid eye movement.