Document Classification

Section Type: RESULTS

Text: Five prognostic factors were selected at the 0. 0001 level : Karnofsky index < 80 % (relative risk of death = 2. 2, 95 % confidence interval : 1. 7-2. 7), serum bilirubin > 50 micromol/l (relative risk = 2. 1, 95 % confidence interval : 1. 7-2. 6), serum alkaline phosphatase at least twice the upper limit of normal range (relative risk = 1. 6, 95 % confidence interval : 1. 3-2. 0), serum alpha-fetoprotein > 35 microg/l (relative risk = 1. 7, 95 % confidence interval : 1. 4-2. 1), and ultrasonographic portal obstruction (relative risk = 1. 3, 95 % confidence interval : 1. 1-1. 7).