Table 3.
Sample characteristics by REM AHI severity category for incident diastolic nondipping (n=215)
| REM AHI Severity Category | TOTAL | ||||
|---|---|---|---|---|---|
| <1 | 1-4.9 | 5-14.9 | ≥ 15 | ||
| N | 83 | 61 | 40 | 31 | 215 |
| Male, % | 48 | 61 | 63 | 77 | 59 |
| Age, years, mean (sd) | 46 (8) | 49 (7) | 51 (7) | 49 (9) | 48 (8) |
| Body mass index, kg/m2, mean (sd) | 27 (4) | 28 (4) | 29 (4) | 32 (5) | 28 (5) |
| Race/Ethnicity, White, % | 99 | 98 | 95 | 100 | 98 |
| Current smoking, % | 16 | 16 | 20 | 23 | 18 |
| Alcohol, number of drinks/wk, (sd) | 3 (5) | 3 (4) | 5 (6) | 5 (6) | 4 (5) |
| Prevalent hypertension, % | 7 | 20 | 15 | 52 | 19 |
| Type 2 diabetes, % | 0 | 0 | 0 | 0 | 0 |
| Waist-to-hip ratio, mean (sd) | 0.9 (0.1) | 0.9 (0.1) | 0.9 (0.1) | 0.9 (0.1) | 0.9 (0.1) |
| Apnea Hypopnea Index, mean (sd) | 0.9 (3) | 3 (5) | 4 (3) | 17 (17) | 4 (9) |
| NREM Apnea Hypopnea Index, mean (sd) | 1 (3) | 3 (6) | 3 (3) | 14 (19) | 4 (9) |
| REM Apnea Hypopnea Index, mean (sd) | 0.2 (0.3) | 2 (1) | 8 (3) | 30 (13) | 7 (11) |
| Minutes total sleep time, mean (sd) | 390 (54) | 392 (54) | 373 (66) | 399 (68) | 389 (59) |
| Minutes REM sleep, mean (sd) | 75 (27) | 79 (29) | 70 (26) | 65 (25) | 74 (27) |
| Percent REM sleep, mean (sd) | 19 (6) | 20 (6) | 19 (6) | 16 (5) | 19 (6) |
| Minutes slow wave sleep, mean (sd) | 42 (30) | 45 (36) | 39 (32) | 33 (35) | 41 (33) |
| Percent slow wave sleep, mean (sd) | 11 (8) | 10 (8) | 10 (8) | 8 (9) | 11 (8) |
| Epworth sleepiness scale*, mean (sd) | 9 (4) | 9 (4) | 9 (4) | 11 (5) | 9 (4) |
| Excessive daytime sleepiness, % | 24 | 10 | 33 | 19 | 21 |
*
Only available on a subset of studies (n=117)