Perioperative medicine & outcomes

Postoperative delirium and 1-year functional decline, institutionalization and mortality

Eur J AnaesthesiolPublished Prospective multicentre observational study

Main finding · Functional status and quality of life (12-item WHODAS 2.0 score)Result — go to the resultAdjusted mean difference 4.60 95% CI 1.57–7.64

Authors' conclusion

Postoperative delirium is independently associated with long-term functional decline, loss of independence, institutionalisation and increased 1-year mortality. These findings highlight delirium as a key perioperative complication and support prevention strategies and structured long-term follow-up after surgery.

Study context

Population
Adult surgical patients undergoing elective or urgent procedures requiring hospital admission, forty-three hospitals in Spainadult surgical patients, 1-year telephone follow-up completed for 1899 after excluding 81 deaths and 462 nonresponders
Participants
2,442 patients
Exposure
Postoperative delirium within the first 48 h and outcomes at 1 year after surgery
Outcome
Functional status and quality of life (12-item WHODAS 2.0 score)
Follow-up
1 year

Main finding

As reported in the abstract

Adjusted mean difference

4.60

95% CI 1.57–7.64

P = 0.003

Postoperative delirium
adjusted mean difference 4.60 (95% CI 1.57–7.64); P = 0.003

Observational data: associations, not effects.

Secondary outcomes

Institutionalisation

OR (95% CI)P value
Postoperative deliriumIncreased institutionalisation with delirium2.5 (1.07–5.84)P = 0.03

Mortality

Higher mortality with delirium
16.7 vs. 3.1%; P < 0.001
30-day, 60-day, and 365-day mortality
all P < 0.001

Follow-up completeness · 1 year

1-year telephone follow-up completed
1899
Deaths excluded
81
Nonresponders excluded
462

Original publication

Postoperative delirium and 1-year functional decline, institutionalization and mortality. Eur J Anaesthesiol. Published 20 October 2026. doi:10.1097/eja.0000000000002499

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