Id1 Promotes Tumor Cell Migration in Nonsmall Cell Lung Cancers

Table 1

Id1 expression level in primary human lung tissues versus adjacent normal tissue. Expression level is average qRT-PCR signal for Id1/average signal for $\text{GAPDH}\times {10}^3$.

Tissue type	No. samples	Mean (SE)* Id1 expression		95% C.I	${P\text{-value}}^{+}$
		Normal	Tumor
Adenocarcinoma	14	2.55 (0.07)	2.14 (0.14)	(0.09, 0.74)	.02
Squamous Cell Carcinoma	9	2.62 (0.05)	2.68 (0.12)	($-$0.36, 0.24)	.65
Others	7	2.58 (0.07)	2.03 (0.16)	(0.21, 0.90)	.007

*Natural log transformed mean and standard error (SE); ⁺P-value based on two-sided two-sample t-test of hypothesis of no mean difference between tissue types.