Table 4.

Comparison of CEA and ProGRP levels in BALF of lung cancer patients with different CT imaging features ($\overline{x}\pm s$).

CT imaging features	n	CEA (μg/L)	t	P	ProGRP (pg/mL)	t	P
Lobulation sign (%)			0.889	0.376		2.494	0.014
Yes	56	64.78 ± 12.87			151.70 ± 16.90
No	34	62.29 ± 12.90			142.75 ± 15.82
Burr sign (%)			2.109	0.038		3.612	0.001
Yes	34	67.43 ± 11.65			156.65 ± 15.14
No	56	61.66 ± 13.11			143.26 ± 18.10
Vacuolation sign (%)			-0.758	0.450		-0.694	0.489
Yes	14	61.50 ± 10.03			145.25 ± 12.83
No	76	64.27 ± 12.95			148.89 ± 18.78
Ground glass sign (%)			0.765	0.447		4.623	0.000
Yes	39	65.02 ± 12.76			157.76 ± 16.28
No	51	62.94 ± 12.81			141.10 ± 17.43
Pleural effusion (%)			2.614	0.011		2.900	0.005
Yes	27	68.94 ± 10.43			156.20 ± 14.94
No	63	61.65 ± 12.77			144.94 ± 17.63
Lesion diameter (%)			3.935	0.000		5.288	0.000
≥3.0 cm	32	71.08 ± 13.14			161.44 ± 15.00
<3.0 cm	58	59.85 ± 12.86			141.08 ± 18.70