Table 5.
Validation sample: predictive parameters of the NHR, WHR, and dSBQ for OSA by AHI category (n = 4,132).
| AHI ≥ 5 events/h (n = 1,886) | AHI ≥ 15 events/h (n = 705) | AHI ≥ 30 events/h (n = 236) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| NHR | WHR | dSBQ | NHR | WHR | dSBQ | NHR | WHR | dSBQ | |
| SN, % (95% CI) | 89.6 (88.3–89.6) | 87.4 (85.9–87.4) | 80.2 (78.4–82.0) | 92.3 (90.2–92.3) | 91.2 (88.9–91.2) | 87.0 (84.5–89.4) | 93.9 (90.8–93.9) | 93.3 (89.8–93.3) | 89.4 (85.5–93.3) |
| SP, % (95% CI) | 30.3 (28.3–30.3) | 30.6 (28.7–30.6) | 45.1 (43.1–47.2) | 24.0 (22.6–24.0) | 25.1 (23.7–25.1) | 37.8 (36.2–39.4) | 22.1 (20.8–22.1) | 23.3 (21.9–23.3) | 35.0 (33.5–36.5) |
| PPV, % (95% CI) | 51.8 (51.0–51.8) | 51.9 (51.1–51.9) | 55.1 (53.3–57.0) | 19.9 (19.4–19.9) | 20.2 (19.7–20.2) | 22.3 (20.8–23.9) | 6.8 (6.5–6.8) | 7.0 (6.7–7.0) | 7.7 (6.7–8.7) |
| NPV, % (95% CI) | 77.7 (75.2–77.7) | 74.0 (71.4–74.0) | 73.1 (70.8–75.4) | 93.8 (92.2–93.8) | 93.2 (91.6–93.2) | 93.4 (92.1–94.7) | 98.4 (97.5–98.4) | 98.3 (97.4–98.3) | 98.2 (97.5–98.9) |
| AUC, % (95% CI) | 71.1 (69.5–72.7) | 65.8 (64.1–67.5) | 62.7 (60.8–64.6) | 69.8 (67.6–71.9) | 65.1 (62.9–67.3) | 62.4 (60.3–64.4) | 71.3 (68.0–74.6) | 67.2 (63.9–70.4) | 62.2 (59.5–64.9) |
| OR (95% CI) | 3.75 (3.15–4.48) | 3.06 (2.59–3.62) | 3.34 (2.90–3.85) | 3.76 (2.84–5.08) | 3.47 (2.65–4.63) | 4.05 (3.23–5.12) | 4.36 (2.62–7.89) | 4.25 (2.59–7.53) | 4.54 (3.04–7.07) |
| Correctly classified (95% CI) | 57.3 (56.1–57.3) | 56.8 (55.6–56.8) | 61.2 (61.1–61.2) | 35.5 (34.3–35.5) | 36.5 (35.2–36.5) | 46.2 (46.2–46.2) | 26.2 (24.9–26.2) | 27.4 (26.0–27.4) | 38.1 (38.1–38.1) |
AHI = apnea-hypopnea index, AUC = area under receiver operator curve, CI = confidence index, dSBQ = derived STOP-Bang Questionnaire, NHR = neck circumference/height ratio, NPV = negative predictive value, OR = odds ratio, OSA = obstructive sleep apnea, PPV = positive predictive value, SN = sensitivity, SP = specificity, WHR = waist circumference/height ratio.