Figure 3.

Advance Care Planning Engagement Behavior Change and Action Scores Overall and by English and Spanish

AD-only indicates advance directive only arm; PREPARE-AD the patient-centered, advance care planning website plus AD arm. Behavior Change on a 5-point Likert scale. Action scores 0-25. P-values reflect significance for overall group + time interactions using repeated measures, mixed effects linear regression models adjusted for health literacy, baseline ACP documentation, and clustering by physician. Statistical significance set at p < 0.025 to account for multiple comparisons for the two outcomes of Behavior Change and Action Scores. No additional p-value adjustments were made for analyses stratified by language as these were pre-specified. P-values reflect group by time interactions. In addition, all p-values for time were also < 0.001 (i.e., both PREPARE and AD-only increased significantly from baseline).