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Table 5 Univariable and multivariable analysis of the risk of prolonged ICU stay and in-hospital mortality after development of a new significant ventricular, supraventricular arrhythmia, and premature complexes

From: Risk factors and clinical outcomes of arrhythmias in the medical intensive care unit

  Prolonged ICU staya,b Mortality
Univariable Multivariablec Univariable Multivariablec
  n (%) RR (95 % CI) p value RR (95 % CI) p value RR (95 % CI) p value RR (95 % CI) p value
Sex  
 Female 87 (40.5) Ref     Ref    
 Male 128 (59.5) 1.02 (0.76-1.37) 0.897 0.87 (0.56–1.36) 0.542
Age  
 21–50 66 (30.7) Ref     Ref   Ref  
 51–70 79 (36.7) 1.67 (1.13–2.48) 0.011 1.60 (1.09–2.36) 0.017 1.67 (0.84–3.32) 0.143 1.32 (0.68–2.55) 0.411
 >71 70 (32.6) 1.46 (0.96–2.21) 0.078 1.34 (0.87–2.05) 0.185 2.55 (1.34–4.85) 0.004 1.76 (0.91–3.38) 0.092
Mediators  
 0–2 84 (39.1) Ref   Ref   Ref   Ref  
 3–4 92 (42.8) 1.44 (1.03–2.03) 0.034 1.35 (0.97–1.89) 0.075 4.30 (2.01–9.22) <0.001 3.98 (1.89–8.37) <0.001
 ≥5 39 (18.1) 1.39 (0.92–2.11) 0.121 1.17 (0.76–1.80) 0.480 5.23 (2.36–11.59) <0.001 4.12 (1.80–9.43) 0.001
Arrhythmias  
 SVA 38 (17.7)b 44 (20.5) 1.55 (1.17–2.07) 0.003 1.47 (1.09–1.97) 0.011 1.94 (1.25–3.02) 0.003 1.38 (0.89–2.15) 0.146
 VA 16 (7.4)b 27 (12.6) 0.94 (0.53–1.67) 0.822 2.06 (1.29–3.29) 0.003 1.93 (1.18–3.15) 0.008
 PC 59 (27.4)b 82 (38.1) 0.83 (0.59–1.18) 0.310 1.36 (0.87–2.12) 0.174 0.94 (0.61–1.45) 0.789
  1. SVA supraventricular arrhythmias, VA ventricular arrhythmias, PC premature complexes
  2. aICU stay of more than 5 days
  3. bArrhythmias considered for this analysis occurred during the first 3 days at ICU
  4. cFactors included in the model had p < 0.20 in univariable analyses