Table 2

Power table for sample size calculation

		Rate in control group
		7%	9%	10%	13%	15%
Rate in experimental group	2%	269	166	138	89	72
	4%	906	381	283	150	111
	5%	2213	638	435	200	141
	8%	10890	12208	3213	589	325
	10%	1356	13495	–	1774	686

Shaded areas include between-groups differences <5% that surgeons would not accept as different.