Table 6.

Kaplan–Meier survival analysis of the variables related to survival, using the log rank method.

Variable	Value Mean survival in months ± SD	Value Mean survival in months ± SD	P value
Gender	male 175 ± 42	female 57 ± 17	0.09
Nationality	Saudi 94 ± 17	non-Saudi 111 ± 37	0.4
Impaired synthetic function at presentation	no 136 ± 32	yes 6.6 ± 3.6	0.003
Liver fibrosis on biopsy	Stages 1 and 2 117 ± 21	Stages 3 and 4 12 ± 4	0.35
Ursodeoxycholic acid	given 143 ± 33	not given 1.5 ± 1.5	0.0001
All post-operative complications	yes 30 ± 7.8	no 119 ± 36	0.4
Ascending cholangitis	yes 221 ± 23	no 42 ± 16.7	0.01
Post-operative liver failure	yes 8 ± 2.5	no 166 ± 37	0.004

P-values in bold are significant. SD, standard deviation.