Document Classification

Section Type: RESULTS

Text: Rates at 1, 2, and 3 years in the internally cooled electrode group versus the expandable electrode group were as follows : local tumor progression, 12 % versus 17 %, 20 % versus 22 %, and 20 % versus 22 % (P =. 72, log-rank test) ; overall survival, 100 % versus 94 %, 94 % versus 92 %, and 94 % versus 77 % (P =. 29, log-rank test) ; local progression-free survival, 87 % versus 78 %, 73 % versus 66 %, and 73 % versus 46 % (P =. 27, log-rank test) ; and event-free survival, 47 % versus 44 %, 34 % versus 22 %, and 34 % versus 22 % (P =. 40, log-rank test).