Design, implementation, and evaluation of a knowledge translation intervention to increase organ donation after cardiocirculatory death in Canada: a study protocol

Table 3 Power calculation ¹ for ITS study

	Δ³donation rate (per million population per six months)		Δ donation count (per year based on 2011 population size)³		%Δ donation count (per year relative to 2011)³
AR(1)²	r = 0.4	r = 0.8	r = 0.4	r = 0.8	r = 0.4	r = 0.8
West	0.47	0.70	10.0	14.9	8.5%	12.6%
Quebec	0.48	0.73	7.7	11.7	5.6%	8.5%
Ontario	0.64	0.95	17.1	25.4	7.8%	11.5%
Atlantic	1.25	1.87	5.9	8.8	14.0%	21.0%

¹The assumptions for the power calculations were as follows: (a) mean square error (MSE), baseline intercept, and trend equal to the observed pre-intervention values in each region; (b) change in intercept = 0, (c) alpha = 5%; (d) 24 data points before and six after the intervention (N = 30 data points in total).
²AR(1) = autocorrelation parameter.
³Δ = required effect sizes (change in slope).

ISSN: 1748-5908