Table 2.
Polysomnographic data
| Characteristic | Overall | Intervention | Control |
|---|---|---|---|
| Number of valid sleep studies | (n = 194) | (n = 102) | (n = 92)a |
| Apnea-hypopnea index (AHI, events/h): (range) median | (0, 87.2) 7.5 | (0, 87.2) 7.6 | (0, 64.9) 7.3 |
| Mean ± standard deviation | 14.3 ± 16.1 | 15.0 ± 16.6 | 13.6 ± 15.7 |
| Central apnea index: mean ± standard deviation | 2.2 ± 6.7 | 2.9 ± 8.4 | 1.3 ± 3.5 |
| Polysomnography results: N (%) | |||
| Obstructive sleep apnea | 109 (56.2) | 58 (56.9) | 51 (55.4) |
| AHI: mean ± standard deviation | 21.2 ± 15.6 | 20.0 ± 15.2 | 22.6 ± 16.1 |
| Central sleep apnea | 11 (5.6) | 9 (8.8) | 2 (2.2) |
| No sleep apnea | 74 (38.1) | 35 (34.3) | 39 (42.4) |
aThe valid sleep studies in the control group include the 85 obtained as part of the study and 7 obtained as part of routine clinical care