Table 4.

Criterion values and coordinates of the ROC curve of serum IL-32 concentration for distinguishing COPD from healthy people.

Criterion	Sensitivity	95% CI	Specificity	95% CI	+ LR	95% CI	− LR	95% CI
> 53	100.00	96.9–100.0	12.86	6.1–23.0	1.15	0.6–2.1	0.00	–
> 63	99.14	95.3–100.0	15.71	8.1–26.4	1.18	0.7–2.0	0.055	0.008–0.4
> 87	96.55	91.4–99.1	37.14	25.9–49.5	1.54	1.1–2.1	0.093	0.03–0.2
> 90	89.66	82.6–94.5	41.43	29.8–53.8	1.53	1.2–2.0	0.25	0.1–0.4
> 94	88.79	81.6–93.9	48.57	36.4–60.8	1.73	1.3–2.2	0.23	0.1–0.4
> 101	87.93	80.6–93.2	58.57	46.2–70.2	2.12	1.7–2.6	0.21	0.1–0.4
> 105*	85.34	77.6–91.2	64.29	51.9–75.4	2.39	2.0–2.9	0.23	0.1–0.4
> 113	70.69	61.5–78.8	70.00	57.9–80.4	2.36	1.9–2.9	0.42	0.3–0.7
> 123	60.34	50.8–69.3	71.43	59.4–81.6	2.11	1.7–2.6	0.56	0.4–0.9
> 139	56.90	47.4–66.1	84.29	73.6–91.9	3.62	3.0–4.4	0.51	0.3–0.9
> 150	47.41	38.1–56.9	90.00	80.5–95.9	4.74	3.9–5.8	0.58	0.3–1.2
> 163	42.24	33.1–51.8	97.14	90.1–99.7	14.78	11.9–18.4	0.59	0.2–2.4
> 181	37.07	28.3–46.5	100.00	94.9–100.0	–	–	0.63	–

ROC receiver operating characteristic curve, IL-32 interleukin-32, COPD chronic obstructive pulmonary disease, 95% CI 95% confidence, +LR positive likelihood ratio, −LR negative likelihood ratio.