Promoting shared decision-making in colorectal cancer screening in primary care: A cluster randomized controlled trial.

Of 110 primary care physicians randomized, 83 (76%) collected data on 3,171 patients (mean age 62, 50% women).

In a sensitivity analysis restricted to 62 primary care physicians who participated in a previous data collection, 72% (21/29) already met the primary outcome in the intervention group at baseline and 49% (16/33) in the control group (RR: 1.49; 95% CI: 0.98 to 2.28).