CEACAM5 and lung adenocarcinoma: Univariate analyses revealed that CEA level (OR = 2.105, 95% CI [1.310–3.381], p = 0.002) and Cyfra 21-1 level (OR = 1.737, 95% CI [1.001–3.014], p = 0.049) were significant predictors of lung adenocarcinoma.