Intensive care unit admission
Intensive care unit admission has been studied in 17 papers since 2016: 14 observational studies in people, 3 reviews; 2 in the past year. The newest paper, Apr 24, 2026: “Exploring the Characteristics and Outcomes of Centenarian Patients Admitted to Intensive Care Units: A Systematised Narrative Review”.
17 papers study it17 findingsUpdated
“Patients surviving the first year remained at an increased risk compared to the general population, but much of this difference was attenuated after adjustment for baseline comorbidity (HR, 1.03; 95% CI 1.02-1.04).”
3 of its findings point the other way.
- 10 independent labs in 8 countries
- 3 findings against
- Funders: National High Level Hospital Clinical Research Funding and others
- Humans14
What did studies of Intensive care unit admission find?
6Studies of Intensive care unit admission measured 6 outcomes; the most studied are mortality (2 studies), recurrence-free survival (1) and SPPB (1).
Mortality
no changein humans2HR 1.08–1.17
2 studies
Mortality
no changein humans2HR 1.08–1.17
Intensive care unit admission has no effect on mortality in humans (adjusted HR 1.08, 95% CI 0.83-1.41).
“At the end of follow-up, there were 112 deaths of 232 patients (48.3%) who were admitted to the ICU, compared with 111 deaths of 232 patients (47.8%) who were not: adjusted HR 1.08, 95% CI 0.83-1.41, P = 0.573.”
Humansafter elective major noncardiac surgerymedian 74 monthsn = 464
PloS one
Intensive care unit admission has no effect on mortality in humans (HR 1.17, 95% CI 0.95-1.46).
“Survival was not significantly different between patients admitted in an ICU and an IMCU (HR 1.17, 95% CI 0.95-1.46).”
Humanscritically ill older patients presenting at emergency departmentsn = 3,036
Annals of intensive care
Recurrence-free survival
no changein humans1
1 study
Recurrence-free survival
no changein humans1
Intensive care unit admission has no effect on recurrence-free survival in humans.
“Secondary endpoints, including recurrence-free survival and event-free survival, also did not differ significantly between groups.”
Humansafter elective major noncardiac surgerymedian 74 monthsn = 464
PloS one
SPPB
no changein humans1
1 study
SPPB
no changein humans1
Intensive care unit admission has no effect on SPPB in humans.
“Lack of association between ICU stay, age or sex with SPPB results differs from the results of other studies.”
Humanspatients hospitalized with COVID-19n = 36
Medicine
In-hospital mortality
downin humans1
1 study
In-hospital mortality
downin humans1
Intensive care unit admission decreases in-hospital mortality in humans (in-hospital death rates were 52.3% in Israel, 29.8% in Australia, and 22.1% in USA).
“ICU admission of adults ≥ 80 years is associated with increased in-hospital survival compared to ward admission, but survival rates 2 years later are similar.”
Humanscompared to ward admission
Annals of intensive care
Physical function
downin humans1
1 study
Physical function
downin humans1
Intensive care unit admission impairs physical function in humans.
“In patients treated in the ICU, physical impairments as well as the activity level were significantly more pronounced compared to patients not treated in the ICU.”
Humanshospitalized due to COVID-19
International journal of environmental research and public health
Functional status
downin humans1
1 study
Functional status
downin humans1
Intensive care unit admission impairs functional status in humans (median BI 100 points (IQR 85-100) at baseline vs 85 (IQR 60-100) at hospital discharge, P < .001).
“ICU admission was associated with significant clinical deterioration (median BI 100 points (interquartile range (IQR) 85-100) at baseline vs 85 (IQR 60-100) at hospital discharge, P < .001).”
Humansat hospital discharge vs baselinen = 110
Functional Status and Quality of Life in Elderly Intensive Care Unit Survivors
Journal of the American Geriatrics Society
What is Intensive care unit admission linked with?
8Studies link Intensive care unit admission with 8 measures, most often mortality (3 studies), smoking (1) and physical activity (1).
Mortality
upin humans2downin humans1HR 1.03
3 studies
Mortality
upin humans2downin humans1HR 1.03
Intensive care unit admission raises the risk of mortality in humans (HR, 1.03; 95% CI 1.02-1.04).
“Patients surviving the first year remained at an increased risk compared to the general population, but much of this difference was attenuated after adjustment for baseline comorbidity (HR, 1.03; 95% CI 1.02-1.04).”
Humanssurviving the first year after ICU admission, adjusted for baseline comorbidity
The long-term conditional mortality rate in older ICU patients compared to the general population
Critical care (London, England)
Intensive care unit admission is associated with mortality in humans (52% alive at 6 months).
“Seventy-one percent of patients were still alive when released from ICU, and 52% were still alive after 6 months.”
HumansICU admission6 monthsn = 239
Prognosis of Very Elderly Patients after Intensive Care
Journal of clinical medicine
Intensive care unit admission raises the risk of mortality in humans.
“ASA classification, admission to the ICU, and the preoperative CRP levels showed an independent association with a poor overall survival.”
Humanspostoperative hip fracture surgery
Hip & pelvis
Smoking
upin humans1
1 study
Smoking
upin humans1
Intensive care unit admission is associated with smoking in humans.
“number of years smoking (P = .029) and days of hospitalization (P = .005).”
Humanspatients hospitalized with COVID-19n = 36
Medicine
Physical activity
downin humans1
1 study
Physical activity
downin humans1
Intensive care unit admission is associated with physical activity in humans.
“There was a significant relationship between admission to the ICU and having a heart disease (P = .015), the level of physical activity (P = .049)”
Humanspatients hospitalized with COVID-19n = 36
Medicine
Heart disease
upin humans1
1 study
Heart disease
upin humans1
Intensive care unit admission is associated with heart disease in humans.
“There was a significant relationship between admission to the ICU and having a heart disease (P = .015)”
Humanspatients hospitalized with COVID-19n = 36
Medicine
Hospital length of stay
upin humans1
1 study
Hospital length of stay
upin humans1
Intensive care unit admission is associated with hospital length of stay in humans (median 12.4 days (range 5.7-31 days)).
“The median length of hospital stay was 12.4 days (range: 5.7-31 days; IQR: 11-17.6 days).”
Reviewn = 16,859
Critical care (London, England)
1-year mortality
upin humans1
1 study
1-year mortality
upin humans1
Intensive care unit admission is associated with 1-year mortality in humans (mean 1-year mortality 45.6%).
“The mean six-month and 1-year mortality rates were 38.6% and 45.6%, respectively.”
Review1 yearn = 16,859
Critical care (London, England)
Hospital mortality
upin humans1
1 study
Hospital mortality
upin humans1
Intensive care unit admission is associated with hospital mortality in humans (median 25.55% (range 0%-62.5%)).
“The median hospital mortality was 25.55% (range: 0%-62.5%; IQR: 15%-35.5%).”
Reviewn = 16,859
Critical care (London, England)
Functional dependency
upin humans1+17%
1 study
Functional dependency
upin humans1+17%
Intensive care unit admission is associated with functional dependency in humans (17%).
“Among the patients which were non-dependent before hospitalization, 17% became dependent.”
Humansnon-dependent before hospitalization6 months
Prognosis of Very Elderly Patients after Intensive Care
Journal of clinical medicine