Table 2.

Characteristics of patients with lung cancers or second lung cancers

Variable	Lung cancer n = 909	Second lung cancer n = 166	p value
Age (years)	61.87 ± 10.92	63.07 ± 10.60	0.189
SUVmax of tumor	5.18 ± 4.73	4.00 ± 3.90	0.020
Tumor size (cm)	2.04 ± 1.46	1.73 ± 1.14	0.003
CEA (ng/ml)	4.14 ± 10.09	4.11 ± 7.93	0.969
Dissected lymph nodes (n)	11.46 ± 7.01	10.74 ± 6.63	0.223
FEV1 (%)	86.80 ± 16.25	84.87 ± 13.94	0. 189
GGO ratio	0.48 ± 0.52	0.47 ± 0.41	0.886

Statistical significance is defined as p < 0.05 (Bold)