Figure 5From: Prediction and course of symptoms and lung function around an exacerbation in chronic obstructive pulmonary diseaseROC-curve depicting Sensitivity versus False positive rate, i.e. 1-specificity, of change in total symptom score per week to predict a moderate or severe exacerbation. Area under curve = 0.70. Dotted diagonal line represents an imaginary test without any predictive value.Back to article page