Table 2.
Indices of obstructive sleep apnea severity in the MESA, the MrOS study, and the SHHS.
| SHHS (n = 5473) | MESA (n = 1904) | MrOS (n = 2685) | |
|---|---|---|---|
| Total number of events, n (%) | 872,808 | 315,506 | 404,115 |
| Events with ≥ 3% desaturation only | 474819 (54.4%) | 137224 (43.5%) | 172034 (42.6%) |
| Events with arousal only | 114215 (13.1%) | 47350 (15.0%) | 44033 (10.9%) |
| Total AHI, events/h | 27.4 (20.7) | 28.4 (20.7) | 25.7 (17.1) |
| AHI≥3%Only | 14.9 (13.2) | 12.1 (11.4) | 10.8 (8.8) |
| AHIArOnly | 3.5 (3.4) | 4.2 (4.3) | 2.8 (2.8) |
| Prevalence of moderate to severe OSA, n (%) | |||
| Total AHI ≥ 15 events/h | 3,682 (67.3%) | 1,340 (70.4%) | 1,841 (68.6%) |
| AHI≥3% ≥ 15 events/h | 3,168 (57.9%) | 1,110 (58.3%) | 1,619 (60.3%) |
The numbers are mean (standard deviation) or total number (proportion). Total AHI = total number of apneas and hypopneas associated with ≥ 3% desaturation or arousal, AHI≥3%Only = total number of apneas and hypopneas associated with ≥ 3% desaturation and with no arousal, AHIArOnly = total number of apneas and hypopneas associated with arousal and with desaturation < 3%, AHI≥3% = total number of apneas and hypopneas associated with ≥ 3% desaturation regardless of arousal, MESA = Multi-Ethnic Study of Atherosclerosis, MrOS = Osteoporotic Fractures in Men, SHHS = Sleep Heart Health Study.