Table 2. OSA prevalence.
| Study | Number | Study design | Study year | AHI | Hypopnea desaturation definition | OSA prevalence |
|---|---|---|---|---|---|---|
| Heinzer et al. [8] | 2,121 | Cohort | 2009–2013 | ≥15 | Arousal or 3% oxygen desaturation | Females: 23.4%; males: 49.7% |
| Duran et al. [11] | 2,148 | Cross-sectional | 1993–1997 | ≥5 | Arousal or 4% oxygen desaturation | Females: 28%a; males: 26.2%a |
| ≥15 | Arousal or 4% oxygen desaturation | Females: 7%; males: 14.2% | ||||
| Peppard et al. [12] | 1,520 | Cross-sectional | 1988–1994 | ≥5 | 4% Oxygen desaturation | Females: 13.2%a; males: 26.4%a |
| ≥15 | 4% Oxygen desaturation | Females: 3.9%; males: 8.8% | ||||
| 2007–2010 | ≥5 | 4% Oxygen desaturation | Females: 17.4%a; males: 33.9%a | |||
| ≥15 | 4% Oxygen desaturation | Females: 5.6%; males: 13% | ||||
| Udwadia et al. [13] | 658 | Cross-sectional | 1999–2000 | ≥5 | 4% Oxygen desaturation | Males only: 19.5%a |
| ≥15 | 4% Oxygen desaturation | Males only: 8.4% | ||||
| Elmasry et al. [9] | 2,668 | Cross-sectional | 1996–1998 | ≥20 | 4% Oxygen desaturation | Males only: 14.5% |
| Bixler et al. [14] | 741 | Cross-sectional | 1996–1997 | ≥5 | 4% Oxygen desaturation | Males only: 15.9%a, 3.3% |
| Ip et al. [10] | 150 | Cross-sectional | 1997–1999 | ≥5 | 4% Oxygen desaturation | Males only: 8.8%a, 4.1% |
| 106 | 1998–2000 | ≥5 | 4% Oxygen desaturation | Females only: 3.7% | ||
| Kim et al. [15] | 137 | Cohort | 2001–2003 | ≥5 | 4% Oxygen desaturation | Females: 16%a, 3.2%; males: 27%a, 4.5% |
OSA, obstructive sleep apnea; AHI, apnea-hypopnea index.
aSleep related breathing disorders only.