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Table 2 Odds ratios of key factors associated with survival

From: Effects of modifiable prehospital factors on survival after out-of-hospital cardiac arrest in rural versus urban areas

  Survival to hospital admission Survival to hospital discharge 1 year survival
OR 95% CI p OR 95% CI p OR 95% CI p
Urban vs. rural 1.84 1.43– 2.36 < 0.001 1.51 1.08– 2.11 0.017 1.58 1.11– 2.26 0.012
EMS response time ≥ 10 min vs < 10 min 0.69 0.55– 0.87 0.002 0.61 0.45– 0.83 0.002 0.57 0.41– 0.79 < 0.001
Age (one additional year) 0.97 0.97 –0.98 < 0.001 0.96 0.95– 0.97 < 0.001 0.96 0.95– 0.97 < 0.001
Gender, male vs. female 1.94 1.51 –2.51 < 0.001 3.15 2.10– 4.72 < 0.001 3.02 1.98– 4.61 < 0.001
EMS physician attendance vs. no EMS-physician attendance 2.63 1.86 –3.74 < 0.001 1.37 0.87– 2.16 0.17 1.39 0.86– 2.24 0.18
Witnessed arrest vs. non-witnessed arrest 4.12 3.12– 5.44 < 0.001 7.23 4.20–12.43 < 0.001 6.63 3.78–11.61 < 0.001
OHCA location in public vs. home 1.20 1.10– 1.30 < 0.001 1.31 1.20– 1.43 < 0.001 1.27 1.16– 1.39 < 0.001
Bystander CPR vs. no bystander CPR 1.98 1.52– 2.58 < 0.001 3.05 2.00– 4.65 < 0.001 2.84 1.83– 4.39 < 0.001
Shockable vs. non-shockable rhythm 8.25 6.21– 10.95 < 0.001 25.74 15.71–42.18 < 0.001 39.52 21.14–73.87 < 0.001
Cardiac vs. medical cause for cardiac arrest 1.31 0.92– 1.88 0.14 0.34 0.18–0.63 < 0.001 0.16 0.07– 0.40 < 0.001
  1. Odds ratios (OR) in univariable analysis of key factors associated with survival to hospital admission, survival to hospital discharge and 1 year survival in out-of-hospital cardiac arrest (OHCA) (n = 1138). CI confidence interval, CPR cardiopulmonary resuscitation, EMS emergency medical services, OR odds ratio