Table 1. The difference of SELENBP1 expression in bronchial epithelial carcinogenic process.

	n	Score
		Low(0–2)	Moderate(3–4)	High(5–6)
SELENBP1
NBE	66	9	24	33
SM	64	16	27	21
AH/CIS	73	30	29	14
LSCC	66	42	18	6

The P-value of NBE vs. SM, SM vs. AH/CIS, AH/CIS vs. LSSC and NBE vs. LSSC was 0.030, 0.024, 0.007, and 0.000, respectively, by Mann-Whitney U test.