Condition/Characteristic Number of Successful CPRs (%) Odds Ratio 95% Confidence Interval p-value
Renal impairment 23(7.9%) 0.92 0.40-2.12 0.840
Coronary artery disease 22(8.1%) 1.17 0.52-2.61 0.704
Hypertension 24(12.1%) 3.84 1.61-9.13 0.001
Diabetes mellitus 12(7.7%) 1.00 0.47-2.14 0.986
Pneumonia 2(2.5%) 0.26 0.06-1.11 0.06
Sepsis 1(1.6%) 0.17 0.02-1.29 0.054
Metastatic cancer 4(6.7%) 0.83 0.28-2.47 0.742
Initial cardiac rhythm        
Asystole 5(2.7%) 0.21 0.08-0.56 0.001
Pulseless electrical arrest 10(9.3%) 1.33 0.60-2.91 0.481
Ventricular tachycardia/fibrillation 12(15.4%) 2.92 1.35-6.30 0.005
Atrial fibrillation 1(50%) 12.33 0.75-202.14 0.025
Unknown initial cardiac rhythm 3(12%) 1.70 0.48-6.03 0.407
Table 2: Unadjusted odds ratios for CPR success according to presence of certain pre-morbid conditions and to initial cardiac rhythm.