Table 4.
Sensitivity and specificity of adjusted desaturation index with a data storage rate of 0.5 Hz.
| Sensitivity (CI95%) | Specificity (CI95%) | LR + (CI95%) | LR − (CI95%) | |
|---|---|---|---|---|
| OSAS = RDI ≥ 5 oximetry criteria |
||||
| ADI2 > 19.5 | 86.3 (78–92.3) | 94.1 (71.3–99.9) | 14.7 (12.7–16.9) | 0.15 (0.02–1) |
| ADI3 > 10.4 | 80.4 (71.4–87.6) | 100 (80.5–100) | ∞ | 0.20 |
| ADI4 > 3.7 | 85.3 (76.9–91.5) | 94.1 (71.3–99.9) | 14.5 (12.6–16.7) | 0.16 (0.02–1.1) |
|
| ||||
| OSAS = RDI ≥ 10 oximetry criteria |
||||
| ADI2 > 23.3 | 84.6 (75.5–91.3) | 92.9 (76.5–99.1) | 11.8 (10.4–13.6) | 0.17 (0.04–0.7) |
| ADI3 > 10.6 | 86.8 (78.1–93) | 96.4 (81.7–99.9) | 24.3 (21.8–27.1) | 0.14 (0.02–1) |
| ADI4 > 5.6 | 82.4 (73–89.6) | 100 (87.7–100) | ∞ | 0.18 |
|
| ||||
| OSAS = RDI ≥ 15 oximetry criteria |
||||
| ADI2 > 23.3 | 90.4 (81.9–95.7) | 88.9 (73.9–96.9) | 8.1 (7.1–9.3) | 0.11 (0.03–0.3) |
| ADI3 > 10.8 | 90.4 (81.9–95.7) | 91.7 (77.5–98.2) | 10.9 (9.6–12.2) | 0.11 (0.03–0.4) |
| ADI4 > 6.1 | 86.7 (77.5–93.2) | 97.2 (85.5–99.9) | 31.2 (28.2–34.5) | 0.14 (0.02–1) |
RDI: respiratory disturbance index; ADI2, 3, and 4: adjusted desaturations index ≥2%, 3%, and 4%; LR (+) and (−): positive and negative likelihood ratio; CI95%: confidence interval 95%.