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Table 1 The frequency of a second PBD in group PG

From: The impact of preoperative biliary drainage on postoperative outcomes in patients with malignant obstructive jaundice: a retrospective analysis of 290 consecutive cases at a single medical center

  Total EBS ENBD PTBD Statistic P value
First PBD 159 (100%) 5 (3.1%) 5 (3.1%) 149 (93.7%) χ2 = 5.665 0.082*
Second PBD 8 (5.0%) 1 (20.0%) 1 (20.0%) 6 (4.0%)
  1. *Fisher’s exact test in Monte Carlo mode