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Table 6: 
ROC curve analysis for CAWT and smoking
Criterion (mm) Sensitivity 95% CI Specificity 95% CI +LR −LR
0.5 100.00 94.9–100.0 0.00 0.0–3.8 1.00 NC
0.6 91.55 82.5–96.8 12.37 6.6–20.6 1.04 0.68
0.7 77.46 66.0–86.5 25.77 17.4–35.7 1.04 0.87
0.8 61.97 49.7–73.2 37.11 27.5–47.5 0.99 1.02
0.9 45.07 33.2–57.3 49.48 39.2–59.8 0.89 1.11
1.0 39.44 28.0–51.7 61.86 51.4–71.5 1.03 0.98
1.1 26.76 16.9–38.6 75.26 65.5–83.5 1.08 0.97
1.2 16.90 9.1–27.7 80.41 71.1–87.8 0.86 1.03
1.3 8.53 3.5–18.9 85.70 78.6–91.4 0.76 1.01
1.4 4.23 0.9–11.9 91.75 84.4–96.4 0.51 1.04
1.5 0.00 0.0–5.1 100.00 96.2–100.0 NC 1.00

Criterion (mm)	Sensitivity	95% CI	Specificity	95% CI	+LR	−LR
0.5	100.00	94.9–100.0	0.00	0.0–3.8	1.00	NC
0.6	91.55	82.5–96.8	12.37	6.6–20.6	1.04	0.68
0.7	77.46	66.0–86.5	25.77	17.4–35.7	1.04	0.87
0.8	61.97	49.7–73.2	37.11	27.5–47.5	0.99	1.02
0.9	45.07	33.2–57.3	49.48	39.2–59.8	0.89	1.11
1.0	39.44	28.0–51.7	61.86	51.4–71.5	1.03	0.98
1.1	26.76	16.9–38.6	75.26	65.5–83.5	1.08	0.97
1.2	16.90	9.1–27.7	80.41	71.1–87.8	0.86	1.03
1.3	8.53	3.5–18.9	85.70	78.6–91.4	0.76	1.01
1.4	4.23	0.9–11.9	91.75	84.4–96.4	0.51	1.04
1.5	0.00	0.0–5.1	100.00	96.2–100.0	NC	1.00