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. 2015 Feb 14;15:20. doi: 10.1186/s12876-015-0251-0

Table 4.

The estimated number of complications in each study group used to calculate the provisional sample size

EBD PTBD
0 complications 50% 75%
1 complication 25% 17%
≥2 complications 25% 8%
Total proportion 100% 100%

The estimated proportion of patients is presented for each categorical number of complications.