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©2012 Baishideng Publishing Group Co.
World J Cardiol. Apr 26, 2012; 4(4): 121-127
Published online Apr 26, 2012. doi: 10.4330/wjc.v4.i4.121
Published online Apr 26, 2012. doi: 10.4330/wjc.v4.i4.121
Table 1 Demographics and clinical characteristics (mean ± SD)
Parameter | All (n = 85) | Negative SDB | Positive SDB |
(AHI < 5, n = 28) | (AHI≥5, n = 57) | ||
Age (yr) | 50.5 ± 12.4 | 47.2 ± 12.3 | 52.1 ± 12.2 |
Sex (% male) | 83.50% | 78.60% | 91.60% |
Weight (kg) | 88.1 ± 18.9 | 82.1 ± 17.1 | 91.1 ± 19.2a |
BMI (kg/m2) | 28.9 ± 5.5 | 26.9 ± 4.8 | 29.9 ± 5.6a |
History of hypertension (%) | 34% | 39% | 21% |
History of MI (%) | 6% | 11% | 2% |
History of CAD (%) | 9% | 18% | 3% |
AHI (events/h) | 20.6 ± 27.8 | 1.5 ± 1.2 | 30.0 ± 29.8a |
Obstructive apnea (n) | 34.8 ± 89.3 | 0.9 ± 1.8 | 51.5 ± 105.3a |
Central apnea (n) | 5.7 ± 22.3 | 1.6 ± 4.8 | 7.7 ± 26.9a |
Mean % SaO2 (%) | 93.1 ± 2.7 | 93.9 ± 2.5 | 92.7 ± 2.7a |
Oxygen desaturation index | 12.5 ± 19.6 | 1.1 ± 1.2 | 17.5 ± 21.8a |
Desaturation > 4% (n) | 70.1 ± 120.3 | 6.2 ± 7.0 | 98.4 ± 135.7a |
Apnea arousal (n) | 31.6 ± 79.3 | 1.8 ± 4.9 | 46.2 ± 93.6a |
Total arousals (n) | 200.0 ± 137.8 | 166.1 ± 74.3 | 216.6 ± 158.0a |
Awakening > 1 min (n) | 17.4 ± 32.7 | 11.0 ± 17.2 | 20.6 ± 37.9 |
SDBSS | 9.3 ± 15.3 | 1.4 ± 3.7 | 13.2 ± 17.2a |
Table 2 Per minute sleep-disordered breathing results
Expert | |||
Negative | Positive | ||
Algorithm | Negative | 9782 | 413 |
Positive | 398 | 1381 |
Table 3 Per minute sleep-disordered breathing algorithm performance statistics (%)
Mean | 95% CI | |
Accuracy | 93.2 | 92.8-93.7 |
Sensitivity | 77.0 | 75.0-78.9 |
Specificity | 96.1 | 95.7-96.4 |
Positive predictive value | 77.6 | 75.7-79.6 |
Negative predictive value | 95.9 | 95.6-96.3 |
Table 4 Sleep-disordered breathing severity score performance statistics against apnea/hypopnea index ≥ 5 (%)
Mean | 95% CI | |
Accuracy | 68.2 | 58.3-78.1 |
Sensitivity | 57.9 | 45.0-69.8 |
Specificity | 89.3 | 72.8-96.3 |
Positive predictive value | 91.7 | 82.6-100 |
Negative predictive value | 51.0 | 37.0-65.0 |
Table 5 Sleep-disordered breathing severity score performance statistics against mild, moderate and severe apnea/hypopnea index categories (%)
Sensitivity | Specificity | Accuracy | |
(95% CI) | (95% CI) | (95% CI) | |
Mild | 57.9 | 89.3 | 68.2 |
5 ≤ AHI < 15 | (45.0-69.8) | (72.8-96.3) | (58.3-78.1) |
Moderate | 74.3 | 86.0 | 81.2 |
15 ≤ AHI < 30 | (57.9-85.8) | (73.8-93.0) | (72.9-89.5) |
Severe | 50.0 | 88.1 | 80.0 |
AHI ≥ 30 | (29.0-71.0) | (78.2-93.8) | (71.5-88.5) |
- Citation: Dillier R, Baumann M, Young M, Erne S, Schwizer B, Zuber M, Erne P. Continuous respiratory monitoring for sleep apnea screening by ambulatory hemodynamic monitor. World J Cardiol 2012; 4(4): 121-127
- URL: https://www.wjgnet.com/1949-8462/full/v4/i4/121.htm
- DOI: https://dx.doi.org/10.4330/wjc.v4.i4.121