CESAR: conventional ventilatory support vs extracorporeal membrane oxygenation for severe adult respiratory failure

Table 1 POWER CALCULATION GRID

		Mortality in Control Group
		70%			60%			50%			45%
% of survivors severely disabled		15%	10%	5%	15%	10%	5%	15%	10%	5%	15%	10%	5%
	Primary adverse outcome %	74.5	73	71.5	66	64	62	57.5	55	52.5	53.25	50.5	47.75
Relative risk	0.5	64	66	70	82	86	92	104	112	122	118	128	140
	0.67	136	142	150	180	192	204	236	256	278	270	296	326
	0.75	224	236	250	302	324	348	404	440	480	468	514	566
	0.8	336	356	378	462	496	532	624	682	746	726	800	62

Sample size calculation for different assumptions about mortality, disability and relative risk (Beta = 0.2, Alpha = 0.05, 2 sided)

ISSN: 1472-6963