The two sets of data for Ammann et al., 2010 relate respectively to ‘oral mucositis to any degree’ and ‘other mucositis to any degree’. The observed relationship between sensitivity and specificity across the studies might suggest a threshold effect i.e. some dependence on the definition of mucositis used in the individual studies. However, the highest sensitivity was just 40% and therefore up to less than half of patients who experienced the target condition had mucositis whilst up to 40% of patients who did not develop the outcome also had mucositis.