Table 3.

Composite accuracy of conventional imaging (n=36)

	Sensitivity	Specificity	PPV	NPV	Accuracy
Local disease	30%	100%	100%	79%	8%
Regional lymph nodes	36%	96%	80%	77%	14%
Non-regional lymph nodes	22%	83%	57%	52%	19%
Bone metastases	50%	89%	56%	87%	19%
Other distant metastases	33%	94%	33%	94%	8%
Accuracy of low-dose CT (simulated CI) (n=57)
Regional lymph nodes	27%	100%	100%	79%	7%
Non-regional lymph nodes	31%	100%	100%	79%	9%

CI: conventional imaging; CT: computed tomography; NPV: negative predictive value; PPV: positive predictive value.