Table 3.

Cutoff points of ploidy and tumor markers for diagnosing SCLC

	AUC	95% CI	Sensitivity	Specificity	Cutoff value
ProGRP	0.928	0.877-0.978	0.824	1	151.05
NSE	0.921	0.884-0.975	0.853	0.898	15.8
Max DI	0.838	0.769-0.907	0.956	0.593	2.6395
Median DI	0.862	0.795-0.930	0.75	0.949	2.557
Number of cells with DI greater than 5c	0.962	0.933-0.991	0.956	0.831	5.5
5cER	0.966	0.933-0.991	0.912	0.881	0.0142

Notes: Max DI represents the maximum DI. Median DI is the median DI of the first 20 cells greater than 5C. 5cER: 5c exceeding rate. We used 5cER to represent the percentage of cells with DI greater than 5c in this study.