Comparison of the clinical effects of dual-modality endoscopy and traditional laparotomy for the treatment of intra- and extrahepatic bile duct stones

Table 1 Patient general information

Indicators	Control group (n = 45)	Research group (n = 50)	χ2/t value	P value
Age (yr)	56.51 ± 5.98	56.16 ± 6.54	0.271	0.787
Sex (male/female)	25/20	27/23	0.023	0.879
BMI (kg/m2)	22.67 ± 2.79	22.80 ± 2.63	0.234	0.816
Stone diameter (cm)	1.55 ± 0.42	1.49 ± 0.63	0.540	0.591
Number of stones (n)	2.24 ± 0.57	2.16 ± 0.68	0.618	0.538
Total bilirubin (μmol/L)	34.94 ± 16.11	32.14 ± 16.30	0.841	0.403

BMI: Body mass index.