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Survival after PICU admission: The impact of multiple admissions and complex chronic conditions.

Survival after PICU admission: The impact of multiple admissions and complex chronic conditions.
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Kalzén H, Larsson B, Eksborg S, Lindberg L, Edberg KE, Frostell C,


Kalzén H, Larsson B, Eksborg S, Lindberg L, Edberg KE, Frostell C, (click to view)

Kalzén H, Larsson B, Eksborg S, Lindberg L, Edberg KE, Frostell C,

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PloS one 2018 04 0513(4) e0193294 doi 10.1371/journal.pone.0193294

Abstract
OBJECTIVE
Factors predicting survival over time after pediatric intensive care unit (PICU) admissions are not fully understood. The primary aim of the current study was to investigate whether multiple admissions (MADM) compared to single PICU admissions (SADM) were associated with poor survival over time after being admitted to PICU facilities. Our secondary aim was to investigate if the presence of a complex chronic condition (CCC) would further impair prognosis.

DESIGN
A closed cohort of all children up to 16 years of age admitted to the three PICUs in Sweden between 2008 and 2010 was prospectively collected and followed until 2012, providing survival data for at least one but up to four years of follow-up.

SETTING
Three Swedish tertiary referral centers for pediatric intensive care and extracorporeal membrane oxygenation (ECMO) care were used.

PATIENTS
In total, 3,688 Swedish children with 5,019 PICU admissions were included.

INTERVENTIONS
No interventions were conducted.

MEASUREMENTS
An extensive data set was recorded, including up to four-year survival information following first PICU admission. The patients were assigned to seven admission diagnostic groups, which were then divided into SADM or MADM groups. The difference in survival over time and mortality rates (MR) and mortality rate ratios (MRR) were calculated. SADM and MADM groups with and without an existing CCC were formed. The difference in survival over time between groups was calculated.

MAIN RESULTS
A highly significant difference in survival over time was noted between SADM and MADM patients (p<0.0001), which was intensified by the presence of a CCC. MADM patients with a CCC had the worst outcome, while SADM patients without a CCC had the best outcome. MADM patients with no CCC demonstrated decreased survival over time compared to SADM patients with a CCC. Survival over time was statistically worsened for patients with MADM compared to SADM for the following admission diagnostic groups: Cardiovascular, Gastrointestinal/Renal, Respiratory, Neurological, and Miscellaneous. The mortality rate (deaths/patient year of follow-up) during the time of follow-up was 0.023 for SADM and 0.062 for MADM patients. The mortality rate ratio (MRR) between these groups was 2.69. CONCLUSION
Compared to single admissions, multiple admissions to PICU were associated with a significant decrease in survival over time in some but not all diagnostic groups. Regarding our secondary aim, we found that when the presence of a CCC is factored into the survival analysis, survival over time is further impaired.

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