Pre-ICU Hospital Length of Stay and 30-day Mortality in the Very Old: a National Cohort of 315 042 ICU Admissions

NCT07571213 | Completed

• 1 other identifier: Age-length of stay
• Study Type: observational
• Target: 315,042
• Locations: 1 country
• Sites: 1

Brief Summary

How does waiting in hospital before intensive care affect older patients?Patients who become seriously ill are sometimes admitted to a regular hospital ward first, and only transferred to the intensive care unit (ICU) when their condition worsens. The longer this wait, the higher the risk of dying within the following weeks. The number of very old patients (aged 80 and over) considered for ICU care is rising, and decisions about whether and when to admit them are difficult. It is not known whether the wait before ICU matters as much in this age group as in younger patients, or whether it carries different weight when judging how serious their illness is. Over 315,000 adults admitted to Swedish ICUs between 2005 and 2016 were examined, and statistical models were used to estimate how the risk of dying within 30 days depends on age and on the time spent in hospital before reaching the ICU.

Conditions

Intensive Care (ICU); Age Over 80 Years; Hospital Length of Stay; Mortality

Keywords

Age; icu; hospital lenght of stay; 30-day mortality; risk factor

Outcome Measures

Primary Outcomes (1)

• Mortality

  30 day

Study Arms (1)

Patients admitted to Swedish ICUs

Patients admitted to Swedish ICUs between 2005 and 2017

Other: Time in hospital before ICU admission.

Interventions

Time in hospital before ICU admission. OTHER

Time in hospital before ICU admission by age groups.

Patients admitted to Swedish ICUs

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

Patient admitted to a Swedish ICU that reported the admission to the Swedish intensive care registry.

You may qualify if:

• Patient admitted to a Swedish ICU that reported the admission to the Swedish intensive care registry.

Sponsors & Collaborators

• Uppsala University: lead
• Region Dalarna: collaborator

Study Sites (1)

Uppsala University

Uppsala, Sweden

Location

MeSH Terms

Interventions

Time

Intervention Hierarchy (Ancestors)

Physical Phenomena

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 29, 2026
• First Posted: May 6, 2026
• Study Start: September 30, 2019
• Primary Completion: September 30, 2019
• Study Completion: September 30, 2019
• Last Updated: May 6, 2026

Record last verified: 2026-04

Data Sharing

• IPD Sharing: Will not share

Locations

SE (1)