Table 2.

The median and positive rates of tumor markers in benign chest disease (BCD), lung adenocarcinoma (LAC), and lung squamous cell carcinoma (LSCC).

Parameters	BCD n = 103	LAC n = 424	LSCC n = 166	p1 value	p2 value	p3 value
Median (ng/ml)
CEA	2.1	7.4	3.3	0.000	0.000	0.000
CA125	12.8	22.5	20.0	0.000	0.000	0.074
CA15-3	12.3	20.4	15.0	0.000	0.035	0.000
CA19-9	10.5	14.0	10.6	0.010	0.397	0.000
CA72-4	1.3	2.0	1.8	0.000	0.019	0.164
CYFRA21-1	2.3	4.1	7.6	0.000	0.000	0.000
SCC-Ag	0.7	0.6	1.3	0.443	0.000	0.000
Positive rate (%)
CEA	7.8	61.8	23.5	0.000	0.001	0.000
CA125	8.7	40.6	28.9	0.000	0.000	0.009
CA15-3	2.9	30.2	9.0	0.000	0.051	0.000
CA19-9	5.8	19.8	5.4	0.001	0.888	0.000
CA72-4	11.7	21.7	16.9	0.022	0.242	0.190
CYFRA21-1	13.6	61.6	88.6	0.000	0.000	0.000
SCC-Ag	3.9	8.5	39.8	0.113	0.000	0.000

p 1 value: BCD vs LAC, p2 value: BCD vs LSCC, p3 value: LAC vs LSCC.