Table 2.

Multivariable logistic regression models: (a) successful return of spontaneous circulation as the dependent variable, (b) good neurological outcome [defined as Cerebral Performance Category (CPC) < 3 at hospital discharge] as the dependent variable, (c) preservation of neurological status, defined as no increase in CPC at hospital discharge compared to the CPC at the time of cardiac arrest as the dependent variable.

a)
Variables	Odds Ratio	95% LCI	95% UCI	Standard Error	p-value
Chest compression rate*
100 – 120			Reference
121 – 140	4.48	1.42	14.14	2.63	0.010
> 140	1.93	0.61	6.07	1.13	0.262
Age (decile)	1.09	0.89	1.34	0.11	0.402
VT/VF initial rhythm	1.86	0.91	3.79	0.68	0.089
Charlson comorbidity score	1.16	0.87	1.56	0.17	0.308
Chest compression fraction	2.45	0.83	7.17	1.34	0.103
Monitored bed	0.74	0.39	1.41	0.24	0.363

b)
Variables	Odds Ratio	95% LCI	95% UCI	Standard Error	p-value
Chest Compression rate*
100 – 120*			Reference
121 – 140*	2.67	0.30	24.21	3.01	0.382
> 140*	1.32	0.14	12.36	1.51	0.808
Age (decile)	0.99	0.70	1.39	0.17	0.935
VT/VF initial rhythm	7.55	2.68	21.28	3.99	0.000
Charlson comorbidity score	0.63	0.39	1.04	0.16	0.070
Chest compression fraction	0.61	0.14	2.63	0.45	0.505
Monitored bed	0.84	0.26	2.71	0.50	0.772

(c)
Variables	Odds Ratio	95% LCI	95% UCI	Standard Error	p-value
Chest Compression rate*
100 – 120*			Reference
121 – 140*	1.86	0.20	17.39	2.12	0.588
> 140*	0.92	0.09	8.97	1.07	0.943
Age (decile)	1.03	0.74	1.44	0.18	0.863
VT/VF initial rhythm	6.14	2.30	16.37	3.07	0.000
Charlson comorbidity score	0.75	0.47	1.20	0.18	0.231
Chest compression fraction	0.55	0.13	2.34	0.41	0.419
Monitored bed	0.90	0.30	2.66	0.50	0.842

^*Mean chest compression rate for duration of cardiopulmonary resuscitation (compressions/minute); LCI, lower confidence interval; UCI, upper confidence interval; VF, ventricular fibrillation; VT, ventricular tachycardia.