Summary of post-test probability according to the prevalence and predicted positive likelihood ratio.

LR+, predicted positive likelihood ratio. The LR+ = 328.33 derived from the equation (sensitivity/1-specificity) with a sensitivity = 98.5% and specificity = 99.7% in derivation phase.aThe prevalence was calculated based on the culture-positive PTB probability in the derivation phase (132/4140).bThe prevalence was calculated based on the culture-positive PTB probability in validation phase (147/4105).LR+（阳性似然比，positive likelihood ratio）。本次研究推导得到的LR+为328.33，其计算公式为灵敏度（sensitivity）与（1减去特异度（specificity））的比值，推导阶段的灵敏度为98.5%、特异度为99.7%。注a：患病率基于推导阶段培养阳性肺结核（PTB）的发生概率计算得到（132/4140）。注b：患病率基于验证阶段培养阳性肺结核（PTB）的发生概率计算得到（147/4105）。