Performance of Tuberculin Skin Test Measured against Interferon Gamma Release Assay as Reference Standard in Children

Figure 7

Correlation of sensitivity of a 10 mm tuberculin skin test induration threshold in BCG immunised children with geographical latitude of location where studies were conducted: each diamond shaped marker allocates a geographical latitude of the town where the study was located to the sensitivity of the 10 mm induration threshold for studies [1, 4, 5, 7–13].