For probable IPA, possible IPA, colonization and control patients ( n = 34). Receiver operating characteristics (ROC) curve for galactomannan (GM) detection in bronchoalveolar lavage fluid (BALF) and serum graphing sensitivity (true positive results) versus 1-specificity (true negative results) using BALF GM and serum GM to define positivity. Areas under the ROC curve were 0.830 (95%CI, 0.662 to 0.936) for BALF GM and 0.784 (95%CI, 0.610 to 0.906) for serum GM result on the first day of ICU admission. Pairwise comparison of ROC curves showed P= 0.604. CI, confidence interval.