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Table 4 Analysis in the propensity score-based 1:1 matched patients

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 = 4454) Late deterioration
(N = 4454)
P valuec
Primary outcome    
28-day mortality 859 (19.3%) 1108 (24.9%)  
Unadjusted OR 1.00 1.39 (1.26–1.54)  < 0.001
Adjusted OR1 1.00 1.66 (1.45–1.91)  < 0.001
Secondary outcome    
In-hospital mortality 999 (22.5%) 1309 (29.4%)  
Unadjusted OR 1.00 1.45 (1.31–1.59)  < 0.001
Adjusted ORa 1.00 1.72 (1.51–1.95)  < 0.001
ICU admission 1325 (29.8%) 1362 (30.6%)  
Unadjusted OR 1.00 1.04 (0.95–1.14) 0.392
Adjusted ORa 1.00 1.10 (0.99–1.22) 0.080
Hospital LOS after RRS activation (days) 11 (5–21) 14 (6–27)  < 0.001
LOS in ICUb (days) 4 (2–9) 5 (3–10) 0.305
  1. LOS length of stay, RRS rapid response system, OR odds ratio, IRR incidence rate ratio, ICU intensive care unit
  2. aTo minimize effects of remaining confounding factors after matching, adjusted analyses were also performed. Following variables were adjusted: 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
  4. cP values were calculated by conditional logistic regression for binary outcomes and by Wilcoxon signed-rank test for continuous outcomes
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