Effectiveness of a new approach to minimally invasive surgery in palliative treatment of patients with distal malignant biliary obstruction

Table 5 Hazard ratios and 95% confidence intervals for the mortality in patients who underwent internal-external biliary-jejunal drainage as compared to other techniques

Observation period in mo	PTBD	IETBD	ERBS
3	0.39; 0.19-0.82, Р = 0.018	0.31; 0.14-0.69, Р = 0.005	0.75; 0.31-1.76, Р = 0.438
6	0.49; 0.28-0.87, Р = 0.011	0.34; 0.18-0.66, Р < 0.001	0.96; 0.56-1.69, Р = 0.982
9	0.36; 0.22-0.60, Р < 0.001	0.26; 0.14-0.49, Р < 0.001	0.78; 0.49-1.22, Р = 0.232
12	0.39; 0.24-0.64, Р < 0.001	0.26; 0.14-0.48, Р < 0.001	0.86; 0.56- 1.32, Р = 0.507
15	0.38; 0.23-0.62, Р < 0.001	0.30; 0.17-0.54, Р < 0.001	0.77; 0.51-1.16, Р = 0.078

ERBS: Endoscopic retrograde biliary stenting; IETBD: Internal-external transpapillary biliary drainage; PTBD: Percutaneous transhepatic biliary drainage.