Comparison 2. Sensitivity analyses.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mortality ‐ Duration of the treatment with UDCA	8	592	Risk Ratio (M‐H, Fixed, 95% CI)	1.00 [0.46, 2.20]
1.1 Short treatment duration (less than 24 months)	2	34	Risk Ratio (M‐H, Fixed, 95% CI)	0.43 [0.02, 9.00]
1.2 Long treatment duration (24 months or more)	6	558	Risk Ratio (M‐H, Fixed, 95% CI)	1.08 [0.48, 2.44]
2 Mortality ‐ Dose of UDCA in the treatment	8	592	Risk Ratio (M‐H, Fixed, 95% CI)	1.00 [0.46, 2.20]
2.1 Low dose of UDCA (less than 13 mg/kg body weight /day)	3	78	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
2.2 High dose of UDCA (13 mg/kg body weight/day or more)	5	514	Risk Ratio (M‐H, Fixed, 95% CI)	1.00 [0.46, 2.20]
3 Mortality ‐ Different duration of the treatment with different dose of UDCA	8	592	Risk Ratio (M‐H, Fixed, 95% CI)	1.00 [0.46, 2.20]
3.1 Short treatment duration with low dose of UDCA	1	20	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
3.2 Short treatment duration with high dose of UDCA	1	14	Risk Ratio (M‐H, Fixed, 95% CI)	0.43 [0.02, 9.00]
3.3 Long treatment duration with low dose of UDCA	2	58	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
3.4 Long treatment duration with high dose of UDCA	4	500	Risk Ratio (M‐H, Fixed, 95% CI)	1.08 [0.48, 2.44]