. 2021 Sep 24;11:19044. doi: 10.1038/s41598-021-98513-8

Table 2.

Risk factors of CEA abnormalities.

	CEA (< 5 ng/mL)	CEA (≥ 5 ng/mL)	OR	95% CI	p
Age (years)
< 65	3298	71	2.686	1.935–3.727	< 0.001
≥ 65	1349	78	2.686	1.935–3.727	< 0.001
Sex
Male	3148	101	1.002	0.707–1.421	0.991
Female	1499	48	1.002	0.707–1.421	0.991
Smoking status
Smoker	2064	70	1.109	0.800–1.538	0.535
Nonsmoker	2583	79	1.109	0.800–1.538	0.535