Advance Care Planning Documentation Completeness and End-of-Life Care: Trends and Associations Among U.S. Older Adults

Using 2010–2022 Health and Retirement Study data, this study finds that while comprehensive advance care planning documentation is associated with less aggressive end-of-life care and higher hospice enrollment among U.S. older adults, the incremental benefits of having two documents over one are modest and the associations are strongest for those with expected deaths.

The Gist

Imagine your life is a long road trip. Advance Care Planning (ACP) is like packing a detailed map and writing down your travel preferences before you get on the road. Specifically, it involves two main documents: a Living Will (which says what medical treatments you want or don't want if you can't speak) and a Durable Power of Attorney (which appoints a trusted friend or family member to make decisions for you).

This study asked a simple but crucial question: Does having both of these documents in your glovebox make a bigger difference than having just one, or even none? And does it actually help steer the car toward a smoother, more peaceful end-of-life journey?

Here is what the researchers found, broken down into everyday terms:

The Big Picture: More Paper, More Peace

The researchers looked at data from over 5,000 older Americans who passed away between 2010 and 2022. They noticed a trend: around 2014, more people started filling out these forms, like a sudden rush of drivers finally checking their maps before a long trip.

When they compared people with no documents to those with any documents (even just one), the results were clear:

• Fewer "Hard Brakes": People with documentation were less likely to end up in the Intensive Care Unit (ICU) or hooked up to aggressive life-support machines that might just prolong suffering rather than life.
• More "Comfort Stops": They were much more likely to enroll in hospice care (which focuses on comfort and dignity) and to pass away at home or in a familiar setting, rather than in a hospital.

The "One vs. Two" Documents Mystery

You might think, "If one document is good, two must be twice as good!" But the study found something a bit more nuanced.

Think of it like this:

• No Map: You are driving blind. The doctors and family have to guess your destination, often leading to a chaotic, aggressive route (ICU, life support).
• One Document: You have a rough sketch. It's enough to get you mostly on the right path.
• Two Documents: You have the sketch plus a designated navigator. This is the "gold standard."

The Surprise: While having two documents is slightly better than having one, the extra benefit wasn't huge. Having any plan was the most important step. Once you have a plan, adding a second layer of detail helps a little bit, but it doesn't completely change the outcome. The biggest leap in quality of care happens when you go from having nothing to having something.

The "Unexpected Detour" Factor

The study also found that these maps work best when the trip is going as planned.

• Expected Endings: If a person is sick and everyone knows the trip is nearing its end, having these documents works like a charm. The car stays on the smooth road to a peaceful destination.
• Unexpected Endings: If the car crashes suddenly (an unexpected death), there isn't enough time to read the map or follow the instructions. In these chaotic moments, the documents matter less because the situation moves too fast for them to be used.

The Bottom Line

This research tells us that writing down your wishes is the most powerful tool you have. It acts as a shield against unnecessary, aggressive medical treatments and guides your loved ones toward a more comfortable, hospice-focused end of life.

While having both a Living Will and a Power of Attorney is the "perfect" setup, the most critical takeaway is simply this: Don't leave the garage without a map. Even a simple plan is far better than no plan at all, ensuring that your final journey reflects your true wishes.

Technical Summary

Technical Summary: Advance Care Planning Documentation Completeness and End-of-Life Care

1. Problem Statement
Advance Care Planning (ACP) documentation, specifically living wills and durable powers of attorney (DPOA), is designed to facilitate goal-concordant end-of-life (EOL) care. However, significant gaps remain in the literature regarding:

• Whether comprehensive documentation (possessing both a living will and a DPOA) confers additional clinical benefits compared to having only one document or none.
• How the associations between documentation completeness and EOL care outcomes vary across different clinical contexts (e.g., expected vs. unexpected death).
• The temporal trends in ACP documentation adoption over the last decade.

2. Methodology
The study employed a large-scale, retrospective observational design using data from the Health and Retirement Study (HRS) exit interviews.

• Data Source & Cohort: The analysis utilized data from 2010 to 2022, covering 5,622 decedents (representing an estimated 23.2 million U.S. adults aged 50+).
• Exposure Variable: ACP documentation status was categorized into three distinct groups:
  1. None: No legal documents.
  2. One Document: Possession of either a living will or a DPOA.
  3. Two Documents: Possession of both a living will and a DPOA.
• Outcome Measures: The study evaluated four key EOL care metrics:
  • Intensive Care Unit (ICU) use.
  • Receipt of life-sustaining treatments (LST).
  • Hospice enrollment.
  • Place of death (specifically out-of-hospital death).
• Statistical Analysis:
  • Association Analysis: Modified Poisson regression models were used to calculate Adjusted Risk Ratios (aRRs) with 95% Confidence Intervals (CIs), controlling for relevant covariates.
  • Trend Analysis: Joinpoint regression was employed to assess temporal trends in documentation rates over the study period.
  • Subgroup Analysis: Associations were stratified by the predictability of death (expected vs. unexpected) to test for effect modification.

3. Key Contributions

• Granularity of Documentation: Unlike previous studies that often treated ACP as a binary variable (present/absent), this research distinguishes between the completeness of documentation (one vs. two documents), offering a nuanced view of policy effectiveness.
• Contextual Nuance: The study explicitly investigates how clinical context (specifically the predictability of death) moderates the relationship between documentation and care outcomes.
• Longitudinal Scope: By covering a 12-year period (2010–2022), the study captures significant temporal shifts, including a notable inflection point in documentation rates around 2014.

4. Results

• Prevalence and Trends:
  • 42.7% of decedents had two documents, while 28.9% had none.
  • A substantial increase in documentation rates was observed starting around 2014.
• Impact of Documentation vs. None:
  • Compared to having no documentation, having any documentation was associated with:
    • Lower likelihood of receiving life-sustaining treatment (aRR = 0.85; 95% CI: 0.74–0.98).
    • Higher likelihood of hospice enrollment (aRR = 1.43; 95% CI: 1.28–1.60).
    • Higher likelihood of dying out-of-hospital (aRR = 1.11; 95% CI: 1.06–1.18).
  • No significant association was found between documentation and ICU use.
• Impact of Completeness (Two vs. One Document):
  • Possessing two documents showed similar patterns to having one document.
  • After adjustment, the incremental benefit of having two documents over one was modest, suggesting diminishing returns on adding a second document once one is present.
• Contextual Variations:
  • Associations between documentation and less aggressive care were stronger among decedents with expected deaths.
  • These associations were attenuated (weakened) among those with unexpected deaths, indicating that documentation is less effective in guiding care when death occurs suddenly.

5. Significance and Conclusion
The study concludes that while comprehensive ACP documentation is robustly associated with less aggressive end-of-life care and increased hospice utilization, the marginal utility of completing a second document is limited. The findings underscore that the primary value lies in the existence of some formal documentation rather than the specific number of documents.

Furthermore, the results highlight that the efficacy of ACP is heavily dependent on the clinical context; documentation serves as a more effective guide for care when death is anticipated. This suggests that healthcare systems should prioritize the initiation of ACP processes early in the disease trajectory to maximize the alignment of care with patient goals, rather than focusing solely on the volume of paperwork completed.