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. Author manuscript; available in PMC: 2019 Dec 1.
Published in final edited form as: JAMA Intern Med. 2018 Dec 1;178(12):1616–1625. doi: 10.1001/jamainternmed.2018.4657

Table 2:

Percent of Participants with Increased Advance Care Planning Behavior Change and Actions Scores Over Time

Improvement in Behavior Change and
ACP Actions*
Improvement in ACP
Behavior Change only
Improvement in ACP
Actions only
AD-only PREPARE p-value AD-only PREPARE p-value AD-only PREPARE p-value
n (%) n (%) n (%) n (%) n (%) n (%)
All Participants n=505 n=481 n=505 n=481 n=505 n=481
All ACP Activities 452 (89.5) 472 (98.1) <.001 441 (87.3) 469 (97.5) <.001 396 (78.4) 456 (94.8) <.001
Documentation 431 (85.4) 476 (99.0) <.001 419 (83.0) 472 (98.1) <.001 237 (46.9) 422 (87.7) <.001
Discussions 453 (89.7) 474 (98.5) <.001 430 (85.2) 464 (96.5) <.001 397 (78.6) 451 (93.8) <.001
English-speakers n=279 n=262 n=279 n=262 n=279 n=262
All ACP Activities 263 (94.3%) 259 (98.9%)  .004  258 (92.5%) 257 (98.1%) .002 223 (79.9%) 250 (95.4%) <.001
Documentation 247 (88.5%) 261 (99.6%) <.001  236 (84.6%) 258 (98.5%) <.001  166 (59.5%) 252 (96.2%) <.001
Discussions 257 (92.1%) 258 (98.5%)  <.001 249 (89.3%) 255 (97.3%) <.001  212 (76.0%) 248 (94.7%)  <.001
Spanish-speakers n=226 n=219 n=226 n=219 n=226 n=219
All ACP Activities 189 (83.6%) 213 (97.3%) <.001 183 (81.0%) 212 (96.8%) <.001 173 (76.6%) 206 (94.1%) <.001
Documentation 184 (81.4%) 215 (98.2%) <.001 183 (81.0%) 214 (97.7%) <.001 71 (31.4%) 170 (77.6%) <.001
Discussions 196 (86.7%) 216 (98.6%) <.001 181 (80.1%) 209 (95.4%) <.001 185 (81.9%) 203 (92.7%) <.001
*

The validated Advance Care Planning (ACP) Engagement Survey includes both self-reported Behavior Change and Action Scores. Percentages reflects participants with positive slopes over time, adjusted for health literacy, baseline ACP documentation, and clustering by physician.

“All ACP Activities” is a composite measure of Behavior Change and Action scores. We present slopes for all reported ACP activities as well as ACP documentation-specific and ACP discussion-specific activities. To specifically assess engagement in ACP discussions or documentation, we categorized ACP Engagement Survey items into those related to Discussions (i.e. survey item referred to “ask” or “talk”) and Documentation (i.e. survey item referred to “signing” or “documenting”).

Statistical significance set at p=0.017 to account for multiple comparisons for the three outcomes of improvement in behavior change or action, behavior change only and action only. No additional p-value adjustments were made for analyses stratified by language as these were pre-specified.