The relationship between the percentage of pre-test probability, the proportion of negative confirmation tests and the proportion of missed pulmonary embolisms.

Sensitivity and specificity of the screening strategy (99% and 38%, respectively, in this example) can be varied using the slides or by changing the numbers in the yellow area. This illustrates the profound impact this has on the other parameters. (XLS)本示例中，筛查策略的灵敏度（Sensitivity）与特异度（Specificity）分别为99%和38%；可通过调整幻灯片或修改黄色区域内的数值来调整这两项指标。此举可直观展现该操作对其余参数的显著影响。（XLS）