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Table 3 Effects of the hospital LOS before RRS activation on the clinical outcomes

From: The association between hospital length of stay before rapid response system activation and clinical outcomes: a retrospective multicenter cohort study

Variables Early deterioration (N = 5779) Late deterioration (N = 5833) P value
Primary outcome    
28-day mortality 1051 (18.2%) 1483 (25.4%)  
Unadjusted OR 1.00 1.53 (1.40–1.68)  < 0.001
Adjusted OR1 1.00 1.60 (1.44–1.77)  < 0.001
Secondary outcome    
In-hospital mortality 1209 (20.9%) 1758 (30.2%)  
Unadjusted OR 1.00 1.63 (1.50–1.78)  < 0.001
Adjusted ORa 1.00 1.71 (1.55–1.88)  < 0.001
ICU admission 1611 (27.9%) 1774 (30.4%)  
Unadjusted OR 1.00 1.13 (1.04–1.23) 0.003
Adjusted ORa 1.00 1.10 (1.01–1.20) 0.030
Hospital LOS after RRS activation (days) 10 (5–20) 14 (6–27)  
Unadjusted IRR 1.00 1.33 (1.28–1.38)  < 0.001
Adjusted IRRa 1.00 1.30 (1.25–1.35)  < 0.001
LOS in ICUb (days) 4 (2–9) 5 (3–10)  
Unadjusted IRR 1.00 1.21 (1.13–1.30)  < 0.001
Adjusted IRRa 1.00 1.22 (1.14–1.31)  < 0.001
  1. LOS length of stay, RRS rapid response system, OR odds ratio, IRR incidence rate ratio, ICU intensive care unit
  2. aMultivariable logistic regression and negative binomial regression were performed with adjusting for following confounding variables: age, department of admission (medical vs. surgical), whether patients were in postoperative state, comorbidities of solid cancer, hematological malignancy, chronic lung disease, hepatobiliary disease, or cerebrovascular disease, whether DNR (do-not-resuscitate) discussion was made after RRS activation, and NEWS2 (national early warning score 2)
  3. bAnalysis on LOS in ICU included only patients who were admitted to the ICU
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