Table 2.

Results: Effect of Interventions to Weekly Vitamin D Test Order Rates

Pre-Intervention RateAbsolute Effect (95% CI)Relative Effect
Model 1. all primary care 
Effect of both interventions6.9%−1.74* (−2.31 to −1.16)−25.0%
Post-intervention change in slope −0.06 (−0.18 to 0.06) 
Model 2. family medicine
Effect of both interventions5.1%−1.12* (−1.44 to −0.81)−21.8%
Postintervention change in slope −0.08*† (−0.14 to −0.02)
Model 3. internal medicine
Effect of Education Memo9.9%−1.90* (−3.00 to −0.80)−19.2%
Postintervention change in slope−0.04 (−0.26 to 0.18)
Effect of Quick Order Screen Removal0.08 (−1.06 to 1.21)
Postintervention change in slope−0.07 (−0.29 to 0.15) 
  • CI, Confidence interval.

  • * Statistically significant at the 5% level.

  • Cumulative estimated postintervention rate was 2.73% at week 26.

  • Relative Effect: Absolute Effect/Pre-intervention Order Rate.