IL33 and tuberculosis: The area under curve (AUC) of IL-33 ADA peripheral blood T-SPOT.TB to differentiate TPE from all non-TB effusions AUC were 0.753 (95% CI 0.637–0.869), 0.912 (95% CI 0.804–1.000), 0.865 (95% CI 0.713–1.000) respectively for pleural IL-33, pleural ADA and peripheral blood T-SPOT (n = 79, 79, 33 for pleural IL-33, pleural ADA and peripheral blood T-SPOT respectively).