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Wellness Coaching for People With Prediabetes: A Randomized Encouragement Trial to Evaluate Outreach Methods at Kaiser Permanente, Northern California, 2013


This figure illustrates the randomization breakdown of each of the study arms. The left side shows that all secure message-eligible patients were randomized into 4 equal study arms: secure message (Arm 1), IVR (Arm 2), mailed letter (Arm 3) and usual care but no communication about WCC (Arm 4). The right side shows that all secure-message ineligible patients were randomized into 3 equal study arms: IVR (Arm 1), mailed letter (Arm 2), and usual care but no communication about WCC (Arm 3).

Figure. Uptake to the Kaiser Permanente Northern California’s Wellness Coaching Center (WCC) by intervention arm. All pairwise comparisons were significant at P .02 (2 by 2 Pearson χ2 test). Abbreviations: SM, secure messaging; IVR, interactive voice response. 

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