Table 4.

Sensitivity analyses testing sequential intervals of ten compressions/min compared to the reference range of 100-120 compressions/min: multivariable logistic regression models testing (a) successful return of spontaneous circulation as the dependent variable, and (b) good neurological outcome [defined as Cerebral Performance Category (CPC) < 3 at hospital discharge] as the dependent variable.

a)
Variables	Odds Ratio	95% LCI	95% UCI	Standard Error	p-value
Chest compression rate*
100 – 120			Reference
121 – 130	5.17	1.38	19.45	3.50	0.015
131 – 140	4.21	1.28	13.84	2.56	0.018
141 – 150	2.03	0.61	6.78	1.25	0.247
> 150	1.78	0.52	6.15	1.13	0.360
Age (decile)	1.09	0.89	1.34	0.11	0.393
VT/VF initial rhythm	1.90	0.92	3.90	0.70	0.082
Charlson comorbidity score	1.15	0.86	1.54	0.17	0.357
Chest compression fraction	2.49	0.85	7.33	1.37	0.097
Monitored bed	0.73	0.38	1.41	0.25	0.349

b)
Variables	Odds Ratio	95% LCI	95% UCI	Standard Error	p-value
Chest compression rate*
100 – 120			Reference
121 – 130	3.92	0.36	43.04	4.79	0.264
131 – 140	2.19	0.23	21.21	2.54	0.498
141 – 150	1.10	0.10	11.91	1.33	0.940
> 150	1.51	0.15	15.65	1.80	0.729
Age (decile)	0.98	0.70	1.37	0.17	0.893
VT/VF initial rhythm	7.86	2.72	22.71	4.26	0.000
Charlson comorbidity score	0.61	0.37	1.02	0.16	0.057
Chest compression fraction	0.59	0.14	2.51	0.43	0.470
Monitored bed	0.72	0.21	2.48	0.46	0.609

^*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.