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Table 7 Diagnostic ability of the SBQ scores from 1 to 8 at AHI cutoff points 5, 15 and 30 (n = 237)

From: Translation and validation of the STOP-Bang questionnaire into Slovene

SBQ score cutoff n (%) Sensitivity (95% CI) Specificity (95% CI) PPV (95% CI) NPV (95% CI)
Any OSA (AHI ≥ 5)
 1 165 (69.6) 100.0 (97.8–100.0) 1.4 (0.04 –7.5) 69.9 (69.3–70.5) 100.0
 2 163 (68.8) 98.8 (95.7–99.9) 11.1 (4.9–20.7) 71.8 (70.1–73.5) 80.0 (46.6–94.8)
 3 152 (64.1) 92.1 (86.9–95.7) 44.4 (32.7–56.6) 79.2 (75.5–82.4) 71.1 (57.9–81.5)
 4 125 (52.7) 75.8 (86.5–82.1) 61.1 (48.9–72.4) 81.7 (76.7–85.8) 52.4 (44.2–60.4)
 5 75 (31.6) 45.5 (37.7–53.4) 84.7 (34.1–92.1) 87.2 (79.4–92.3) 40.4 (36.4–44.6)
 6 43 (18.1) 36.1 (29.3–43.4) 93.5 (82.1–98.6) 95.8 (88.3–98.6) 26.1 (23.6–28.7)
 7 18 (7.6) 10.9 (6.6–16.7) 98.6 (92.5–99.7) 94.7 (71.0–99.3) 32.6 (31.4–44.71)
 8 3 (1.2) 1.8 (0.4–5.2) 100.0 (95.0–100.0) 100.0 30.8 (30.3–31.2)
Moderate and severe OSA (AHI ≥ 15)
 1 112 (47.3) 100.0 (96.8–100.0) 0.8 (0.02–4.4) 47.5 (47.1–47.9) 100.0
 2 112 (47.3) 100.0 (96.8–100.0) 8.0 (3.9–14.22) 49.3 (48.1–50.6) 100.0
 3 109 (46.0) 97.3 (92.4–99.4) 33.6 (25.4–42.6) 56.8 (53.6–59.9) 93.3 (81.7–97.8)
 4 94 (39.7) 83.9 (75.8–90.2) 52.8 (43.7–61.8) 61.4 (56.6–66.1) 78.6 (70.0–85.2)
 5 61 (25.8) 54.5 (44.8–63.9) 80.0 (71.9–86.6) 70.9 (62.3–78.3) 66.2 (61.1–71.0)
 6 38 (16.0) 33.9 (25.3–43.5) 93.6 (87.8–97.2) 82.6 (69.8–90.7) 61.3 (57.9–64.5)
 7 17 (7.2) 15.2 (9.1–23.2) 98.4 (94.3–99.8) 89.5 (66.8–97.3) 56.4 (54.4–58.4)
 8 3 (1.2) 2.7 (0.6–7.6) 100.0 (97.1–100.0) 100.0 53.4 (52.7–54.2)
Severe OSA (AHI ≥ 30)
 1 60 (25.3) 100.0 (94.0–100.0) 0.6 (0.01–3.1) 25.4 (25.2–25.6) 100.0
 2 60 (25.3) 100.0 (94.0–100.0) 5.6 (2.7–10.1) 26.4 (25.7–27.1) 100.0
 3 59 (24.9) 98.3 (91.1–99.9) 24.9 (18.7–31.9) 30.7 (28.8–32.7) 97.8 (86.1–99.7)
 4 54 (22.8) 90.0 (79.5–96.2) 44.1 (36.6–51.7) 35.3 (31.8–38.9) 92.9 (85.7–96.6)
 5 37 (15.6) 61.7 (48.2–73.9) 72.3 (65.1–78.8) 43.0 (35.6–50.7) 84.8 (80.0–88.6)
 6 27 (11.4) 45.0 (32.1–58.4) 89.3 (83.8–93.4) 58.7 (46.1–70.3) 82.7 (79.1–85.8)
 7 17 (7.2) 28.3 (17.5–41.4) 98.9 (96.0–99.9) 89.5 (66.9–97.3) 80.3 (77.6–82.7)
 8 3 (1.2) 5.0 (1.0–13.9) 100.0 (97.9–100.0) 100.0 76.0 (70.0–81.3)