Safety, quality & education

Using Preanesthesia Clinic Visits to Improve Advance Directives Completion: An Interrupted Time Series Analysis

Anesth AnalgPublished Interrupted time series analysis

Main finding · Advance directives completionResult — go to the resultOdds ratio 18 95% CI 16–21

Authors' conclusion

Standardizing advance directives discussions during preanesthesia visits was associated with more patients completing advance directives, particularly in vulnerable patient groups.

Study context

Population
Adults with >1 comorbidity visiting the Cleveland Clinic preanesthesia clinic before medium- or high-risk noncardiac surgery, January 2015–June 2019visits from 22,430 patients
Participants
26,368 adults
Comparison
Postintervention vs preintervention
  • Postinterventionn = 15,126
  • Preinterventionn = 11,242reference
Outcome
Advance directives completion
Methodological detailsbefore-after, single-centre, segmented regression, confounder-adjusted
  • Before-after
  • Single-centre
  • Segmented regression
  • Confounder-adjusted

Main finding

As reported in the abstract

Odds ratio

18

95% CI 16–21

P < 0.001

By group

Postintervention vs Preintervention
OR 18 (95% CI 16–21); P < 0.001

Further findings

Completion by race (Black vs White)

Black patients had lower preintervention completion; gap steadily closed after intervention
P = 0.001
No difference in amount of immediate increase
P = 0.17
No postintervention change in slope difference
P = 0.17

Completion by insurance (Medicaid vs private)

Medicaid lower preintervention; increases in both groups; difference in slopes did not change
P = 0.43
Difference in proportions did not change
P = 0.23

Completion gap by Federal Poverty Line (<100% vs 139%-400%)

Gap narrowed by approximately half
0.51
  • 95% CI, 0.27-0.98; P = .04
  • Financial status analysed for 16,788 visits from 14,274 patients

Original publication

Using Preanesthesia Clinic Visits to Improve Advance Directives Completion: An Interrupted Time Series Analysis. Anesth Analg. Published 14 May 2023. doi:10.1213/ane.0000000000006533

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