BACH1: A Potential Predictor of Survival in Early-Stage Lung Adenocarcinoma

Table 1

Demographic and clinical characteristics of early-stage lung adenocarcinoma cases.

Characteristics	Training cohort (TCGA)		Validation cohort 1 (GSE13213)		Validation cohort 2 (GSE72094)
	No. of patients	Percent (%)	No. of patients	Percent (%)	No. of patients	Percent (%)
Total no.	306		92		311
Age
<60	85	27.8	32	34.8	45	14.5
60-70	126	41.2	18	19.6	116	37.3
>70	95	31.0	42	45.7	150	48.2
Gender
Male	135	44.1	50	54.3	141	45.3
Female	171	55.9	42	45.7	170	54.7
Pathologic stage
I	215	70.3	79	85.9	246	79.1
II	91	29.7	13	14.1	65	20.9
Laterality
Left	119	38.9	—	—	—	—
Right	183	59.8	—	—	—	—
Unknown	4	1.3	—	—	—	—
Smoking history
Yes	254	83.0	47	51.1	236	75.9
No	52	17.0	45	48.9	75	24.1
BACH1 expression
High	103	33.7	23	33.3	50	19.2
Low	203	66.3	69	66.7	261	80.8