Fig. 4

Coupled forest plots of pooled LR positive and LR negative of chest CT. Numbers were pooled with 95% CI (a). A likelihood ratio matrix diagram which summary LR positive and LR negative for index test with 95% CI (b). The probability graph shows the relationship between pre-test probability and post-test probability (c). DLR diagnostic likelihood ratio, CI confidence interval, LR likelihood ratio, CT computed tomography, LRP likelihood ratio positive, LRN likelihood ratio negative, RUQ right upper quadrant, LLQ lift lower quadrant, RLQ right lower quadrant