To the Editor Dr Deppen and colleagues1 conducted a large meta-analysis that showed the limitations of lung cancer diagnosis using fludeoxyglucose F 18 combined with positron emission tomography (FDG-PET) in areas with endemic infectious lung disease. Although the sensitivity and specificity of FDG-PET diagnosis was heterogeneous across the included studies, thereby compromising interpretation of the pooled results, the relevance of presenting an I2 statistic to underscore and interpret the extent of the heterogeneity should be questioned.
Mills EJ, Jansen JP, Kanters S. Heterogeneity in Meta-analysis of FDG-PET Studies to Diagnose Lung Cancer. JAMA. 2015;313(4):419. doi:10.1001/jama.2014.16482