Table 1. The average tumor size of NSCLC patients with low and high Id1 expression in primary cancer tissues.

Variables	Patient No.	Low Id1 (n)		High Id1 (n)		P value *
Tumor size (cm)	83	3.70±0.24 (30)		4.54±0.24 (53)		0.022

^*P value was calculated by Student's t-test.

Values were expressed as mean ± SEM.