Table 3. The diagnostic power of the IL-31 levels in the pleural fluid combined with the M.tb-specific whole blood IL-31 release assay.

	TPE	MPE	Sensitivity	Specificity
Pleural fluid IL-31 ≥67.5 pg/mL	86.0% (43/50)	0% (0/41)	86.0%	100.0%
Combined with the plasma M.tb-specific IL-31 ≥23.9 pg/mL	94.0% (47/50)	4.9% (2/41)	94.0%	95.1%

TPE: Tuberculous pleural effusion; MPE: Malignant pleural effusion.