Contrast-enhanced ultrasound in evaluating the curative effect of interventional therapy in patients with liver cancer

Table 6 Changes of tumor markers in patients

Time period	Alpha-fetoprotein (ng/mL)	Carcinoembryonic antigen (ng/mL)	Carbohydrate antigen 19-9 (U/mL)	F value	P value
Before treatment	98.57 ± 34.89	5.24 ± 2.11	36.78 ± 14.57
1 month after treatment	56.87 ± 22.31	4.38 ± 1.94	27.36 ± 12.50	25.271	< 0.001
3 months after treatment	43.28 ± 19.12	3.78 ± 1.68	21.04 ± 10.15	23.762	< 0.001
6 months after treatment	30.91 ± 13.45	3.16 ± 1.44	18.49 ± 9.42	30.184	< 0.001

P < 0.05 indicates a significant difference.