ICU sedation, delirium & recovery

Effects of the ABCDEF Bundle on Delirium, Function, and Quality of Life in Australian ICU Patients: A Pragmatic Randomized Controlled Trial

Crit Care MedPublished Randomised controlled trial

Primary resultResult — go to the resultOdds ratio 1.1 95% CI 0.5–2.2

Authors' conclusion

In adult ICU patients, the ABCDEF bundle, compared with usual care, did not reduce the cumulative incidence or duration of delirium.

Study context

Population
Critically ill adults expected to remain in ICU for at least 48 hours, single metropolitan Australian medical/surgical ICU
Comparison
ABCDEF bundle vs usual care
Primary endpoint
Cumulative incidence of delirium (Confusion Assessment Method for ICU)
Methodological detailssingle-centre, pragmatic, Complete ABCDEF bundle adherence in 50% of patients each study day
  • Single-centre
  • Pragmatic
  • Complete ABCDEF bundle adherence in 50% of patients each study day

Primary result

As reported in the abstract

Odds ratio

1.1

95% CI 0.5–2.2

P = 0.86

By group

ABCDEF vs Usual care
OR 1.1 (95% CI 0.5–2.2); P = 0.86

Further findings

OutcomeABCDEFUsual careMean difference (d) (95% CI)P value
Delirium durationmedian 2.0 (IQR 1.3–3.5) dmedian 2.5 (IQR 1.0–4.4) d−0.4 (−1.6 to 0.8)P = 0.53

Median

OutcomeABCDEFUsual careMean difference (95% CI)P value
Functional score (Functional Independence Measure) · ICU discharge55.0 (IQR 37.0–67.3)53.0 (IQR 43.8–62.5)0.0 (−7.7 to 7.6)P = 0.83
OutcomeP value
Quality of life (EuroQol 5D five-level) · 90 days post-ICU dischargeHigher "usual activities" domain scores with ABCDEFP < 0.001

Quality of life (EuroQol 5D five-level) · 90 days post-ICU discharge

No differences in other domains

Original publication

Effects of the ABCDEF Bundle on Delirium, Function, and Quality of Life in Australian ICU Patients: A Pragmatic Randomized Controlled Trial. Crit Care Med. Published 20 May 2026. doi:10.1097/ccm.0000000000007154

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