Pulse Oximetry for the Detection of Obstructive Sleep Apnea Syndrome: Can the Memory Capacity of Oxygen Saturation Influence Their Diagnostic Accuracy?
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%.
