Table 1.

Anticipated power to detect patient and stakeholder-important outcomes on completion of the trial

Outcome (n = 884)	Usual Care*	Decision Aid*	Difference	Power
Patient knowledge	44% (23.3)	60% (20.9)	16% (9.5%, 22.5%)	99%
Patient engagement in the decision-making process (n = 221)	7.0 (5.5)	26.3 (8.2)	19.3 (18.4, 20.2)	99%
Decisional conflict†	35.9 (18.9)	22.3 (21.1)	13.6 (11.0, 16.2)	99%
Trust in the physician	79.3 (19.9)	83.4 (19.8)	4.1 (1.5, 6.7)	86%
Patient satisfaction with the decision made (% agree or strongly agree they are satisfied)	69.7 (25.6)	80 (25.6)	10.3 (4.6%, 16.0%)	99%
Safety (major adverse cardiovascular events)‡	0%	0%	0% (−−)	78%
Proportion of patients admitted for cardiac testing	77%	67%	10% (4.1, 15.9)	90%
Healthcare utilization	8.3 (0.8)	7.0 (0.7)	1.3 (1.2, 1.4)	99%

*Estimates were determined from our completed pilot randomized trial [11].

†Lower decisional conflict scores indicate less conflict experienced by patients related to feeling uninformed.

‡Non-inferiority, one-sided test with alpha = 0.05 with a maximum difference of 5%.