Prevalence and Diagnostic Approach to Sleep Apnea in Hemodialysis Patients: A Population Study

Table 2

Performance of the screening instruments for OSA.

Test	Sensitivity	Specificity	PPV	NPV	Accuracy
Berlin’s Questionnaire	51.9% [42.1–61.6]	54.4% [44.6–64.1]	57.1% [47.4–66.8]	49.0% [39.2–58.8]	53.0%
STOP-BANG	85.2% [78.2–92.2]	54.4% [44.6–64.1]	68.7% [59.6–77.8]	75.8% [67.4–84.2]	71.0%
Adjusted Neck Circumference	29.6% [20.7–38.6]	91.3% [85.8–96.8]	80.0 [72.2–87.8]	52.5% [42.7–62.3]	58.0%
ANT algorithm	90.5% [81.7–99.2]	63.6% [49.3–78.0]	70.4% [56.7–84.0]	87.5% [77.6–97.4]	76.7%

Values are expressed as mean [95% CI].
PPV: positive predictive value; NPV: negative predictive value.
Accuracy: percentage of correctly classified subjects.
ANT algorithm applied to the validation population only.