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Table 4 Logistic regressions for 1-month survival rates and neurologically favorable 1-month survival rates

From: Population density, call-response interval, and survival of out-of-hospital cardiac arrest

  1-month survival Neurologically favorable 1-month survival
  OR 95%CI p OR 95%CI p
Sex           
   Male 1.00      1.00     
   Female 0.95 0.90 - 1.00 0.040 0.87 0.80 - 0.93 <0.001
Age (yrs)           
   ≤59 1.00      1.00     
   60 - 69 0.83 0.72 - 0.96 0.011 0.65 0.54 - 0.80 <0.001
   70 - 79 0.57 0.49 - 0.65 <0.001 0.32 0.26 - 0.40 <0.001
   80 - 89 0.37 0.32 - 0.43 <0.001 0.23 0.18 - 0.29 <0.001
   ≥90 0.27 0.21 - 0.34 <0.001 0.15 0.10 - 0.22 <0.001
Cause of arrest           
   Cardiac 1.00      1.00     
   Non-cardiac 0.81 0.78 - 0.85 <0.001 0.49 0.45 - 0.53 <0.001
First aid by bystander           
   None 1.00      1.00     
   CPR without AED use 1.52 1.45 - 1.60 <0.001 1.99 1.85 - 2.13 <0.001
   CPR with AED use 5.73 4.80 - 6.84 <0.001 9.60 7.89 - 11.7 <0.001
Seasons           
   Summer (June-August) 1.00      1.00     
   Autumn (September-November) 0.95 0.88 - 1.01 0.103 0.94 0.86 - 1.04 0.224
   Winter (December-February) 0.84 0.78 - 0.89 <0.001 0.81 0.74 - 0.90 <0.001
   Spring (March-May) 0.85 0.80 - 0.91 <0.001 0.80 0.73 - 0.88 <0.001
Population density (/km2)           
   Very low (<250) 1.00      1.00     
   Low (250-999) 1.14 0.99 - 1.30 0.067 1.03 0.85 - 1.25 0.776
   Middle-low (1,000-2,999) 1.34 1.18 - 1.53 <0.001 1.29 1.08 - 1.55 0.006
   Middle-high (3,000-5,999) 1.53 1.35 - 1.74 <0.001 1.29 1.08 - 1.55 0.006
   High (6,000-9,999) 1.63 1.42 - 1.85 <0.001 1.39 1.15 - 1.67 0.001
   Very high (≥10,000) 1.64 1.44 - 1.87 <0.001 1.47 1.22 - 1.77 <0.001
The proportion of neighborhood elderly people (aged ≥65 yrs; %)           
   <15 1.00      1.00     
   15 - 25 0.89 0.80 - 0.98 0.025 0.94 0.82 - 1.08 0.384
   >25 0.82 0.72 - 0.94 0.005 0.81 0.68 - 0.96 0.017
  1. CPR: cardiopulmonary resuscitation, AED: automated external defibrillators, OR: odds ratio, CI: confidence interval