Table 2. Comparison of biochemical indicators.

Characteristics	Pretreatment	Posttreatment (1 month)	P value
Total bilirubin (μmol/L)	189.47±59.20	44.65±16.12	<0.001
Direct bilirubin (μmol/L)	144.21±55.83	27.95±13.86	<0.001
Alanine aminotransferase (U/L)	89.62±30.85	49.44±14.25	<0.001
Albumin (g/L)	36.32±2.05	40.22±1.95	<0.001
Carbohydrate antigen-199 (U/mL)	584.59±269.82	176.76±100.68	<0.001

Numerical data are expressed as the mean ± standard deviation. P values are the comparison of the laboratory indices at 1-month postoperation versus those at preoperation, with P<0.05 being significant.