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. 2014 Apr;5(2):127–141. doi: 10.3978/j.issn.2078-6891.2014.008

Table 2. Definitions of various parameters.

Parameters (40,41) Formula
Detection rate of SNs No. of the cases with detectable SNs/No. of the total cases
Negative predictive value No. of patients with true-negative node (SN + NSN)/No. of patients with true-negative node + patients with false-negative SN
Accuracy No. of patients with positive SN + No. of patients with true-negative SN/No. of patients with an identified SN
Sensitivity No. of patients with true-positive SN/No. of patients with true-positive SN + patients with false-negative SN