Accuracy of sputum colour in predicting neutrophilic inflammation.

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Presentation transcript:

Accuracy of sputum colour in predicting neutrophilic inflammation. Accuracy of sputum colour in predicting neutrophilic inflammation. (A) ROC curve showing the ability of sputum colour to predict the presence of neutrophilic asthma. (B) Sensitivity, specificity, positive and negative likelihood ratio (LR+ and LR−, respectively) tabulated for each sputum colour group cut point based on neutrophil proportion (ROC 1) and absolute neutrophil count (ROC 2). LR−, negative likelihood ratio; LR+, positive likelihood ratio; n, number of participants; ROC, receiver operator characteristic. Kavita Pabreja et al. BMJ Open Resp Res 2017;4:e000236 ©2017 by British Thoracic Society