Table 2.
Device adherence information.
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | p-Value | |
|---|---|---|---|---|---|
| −39,727 | −40,406 | −41,691 | −42,559 | ||
| Average daily adherence (all days) (hours/day) | 4.14 ± 2.57 | 4.39 ± 2.52 | 4.46 ± 2.49 | 4.50 ± 2.44 | <0.0001 |
| Average daily adherence (days used) (hours/day) | 5.39 ± 2.21 | 5.59 ± 2.13 | 5.63 ± 2.08 | 5.64 ± 2.04 | <0.0001 |
| Percent days used (%) | 71.5 ± 28.9 | 73.8 ± 28.0 | 74.8 ± 27.5 | 75.3 ± 27.0 | <0.0001 |
| Percent days used with >4 h nightly use (%) | 53.4 ± 33.6 | 57.1 ± 33.0 | 58.4 ± 32.8 | 59.5 ± 32.5 | <0.0001 |
| CMS adherence, n (%) | 15,736 (39.6%) | 17,671 (43.7%) | 18,925 (45.4%) | 19,996 (47%) | <0.0001 |
| Average leak (L/min) | 32.5 ± 23.4 | 32.3 ± 22.1 | 31.4 ± 21.1 | 31.0 ± 21.0 | <0.0001 |
| Percent of night with high leak | 5.9 ± 12.5 | 5.4 ± 12.9 | 4.8 ± 11.1 | 4.3 ± 10.6 | <0.0001 |
| Median (IQR) | 0.8 (0.1, 5.2) | 0.7 (0.1, 4.3) | 0.6 (0.0, 3.5) | 0.5 (0, 3.0) | <0.0001 |
| Residual Apnea Hyponea–Index | 3.9 ± 5.3 | 4.0 ± 5.1 | 3.9 ± 5.1 | 4.0 ± 5.2 | 0.004 |
| Median (IQR); (events/hour) | 2.4 (1.1, 4.7) | 2.5 (1.2, 4.8) | 2.5 (1.2, 4.8) | 2.5 (1.2, 4.9) | <0.0001 |
| Residual Central Apnea Index | 0.6 ± 1.8 | 0.7 ± 1.8 | 0.7 ± 1.9 | 0.7 ± 1.9 | <0.0001 |
| Median (IQR) (events/hour) | 0.1 (0, 0.5) | 0.2 (0, 0.6) | 0.2 (0, 0.6) | 0.2 (0, 0.6) | <0.0001 |
CMS = Center for Medicare Medicaid Services (Medicare); IQR = interquartile range; L/min = liters per minute.