Tablle 2. Findings of per-protocol and intention-to-treat analyses for primary outcomes “confidence in decision” and “satisfaction with decision” at time t1.

	Control group			Intervention group			Significance			Effect size
	Breast cancer	Colon cancer	Total	Breast cancer	Colon cancer	Total	Group	Cancer type	Interaction	Group
	M (SD); n	M (SD); n	M (SD); n	M (SD); n	M (SD); n	M (SD); n	p	p	p	d*3 (95% CI)
Confidence in decision*1 Per-protocol Intention-to-treat*2	83.2 (20.8); 51 82.5 (18.5); 142	77.2 (22.7); 28 78.0 (18.3); 79	81.0 (21.5); 79 81.0 (18.4); 224	83.7 (12.0); 18 84.2 (18.1); 103	78.7 (17.5); 24 78.3 (16.3); 85	80.9 (15.4); 42 81.5 (17.4); 190	0.925 0.740	0.204 0.123	0.891 0.955	0.03 (–0.35 to 0.40)
Satisfaction with decision*1 Per-protocol Intention-to-treat*2	83.6 (17.4); 52 83.2 (15.3); 145	80.6 (20.9); 27 79.8 (16.8); 79	82.6 (18.6); 79 82.0 (15.7); 223	90.0 (11.0); 17 86.4 (13.9); 114	85.9 (12.6); 23 84.4 (13.4); 82	87.7 (12.0); 40 85.6 (14.1); 201	0.182 0.310	0.460 0.243	0.874 0.762	0.24 (–0.14 to 0.62)

Full findings reported in eMethods.

M, mean; SD, standard deviation; n, sample size; CI, confidence interval; d , Cohen’s d

^*1Scores range from 0 to 100. 0 is low, 100 high for satisfaction with decision/confidence in decision.

^*2Intention-to-treat analysis assuming the most likely scenario: missing values for the control group were estimated on the basis of available data from the control group; missing values for physicians in the intervention group who had undergone training were estimated on the basis of available data from the intervention group; missing values for physicians in the intervention group who had not undergone training were estimated on the basis of data from the control group.

^*3Cohen’s d was estimated on the basis of the means and standard deviations of the intention-to-treat analysis and sample size of the per-protocol analysis