Table 5. Independent variables associated with high level of Ki-67 expression in 136 patients with lung adenocarcinoma.

Variables	Odds ratio (95% CI)	P*
Smoking	4.577 (0.992, 21.109)†	0.051
Pathologic grade
Moderately or poorly differentiated	3.091 (1.336, 7.147)‡	0.008

CI, confidence interval; *, P value was determined using logistic regression analysis; ^†, odds ratio for high level of Ki-67 expression versus non-smokers; ^‡, odds ratio for high level of Ki-67 expression versus patients with well-differentiated tumors.