Document Classification

Section Type: RESULTS

Text: The 2 to 4 mm group had a significantly shorter catheterization time compared with the other 2 groups in the log-rank test (2-4 vs < 2 mm group ; P = 0. 01, 2-4 vs 4 mm group ; P < 0. 001), and higher success rate in the first attempt (< 2 [43. 8 %] vs 2-4 mm [76. 9 %], P = 0. 02 ; 2-4 [76. 9 %] vs 4. 0 mm [19. 4 %], P < 0. 001), and the overall attempt (< 2 [62. 5 %] vs 2-4 mm [89. 7 %], P = 0. 04 ; 2-4 [89. 7 %] vs 4. 0 mm [51. 6 %], P = 0. 002).