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. Author manuscript; available in PMC: 2020 May 21.
Published in final edited form as: Healthc (Amst). 2016 May 11;4(4):340–345. doi: 10.1016/j.hjdsi.2016.04.005

TABLE 4.

Change in Colonoscopy Screening Rates at the Intervention and Control Practices

Site Order Rate (%) Completion Rate (%)

Pre Year Post Year Difference Pre Year Post Year Difference
Intervention Practice 42.4 49 6.6 16.5 17.1 0.6
Control Practices 23.4 19.5 −3.8 10.7 8 −2.7

Unadjusted Difference-in-Difference 10.4 3.3

Adjusted Model Estimates
Difference-in-Difference 11.8 3.5
95% Confidence Interval 8.0 – 15.6 1.1 – 5.9
P Value <0.001 0.004