Association between cardiopulmonary resuscitation duration and one-month neurological outcomes for out-of-hospital cardiac arrest: a prospective cohort study

Table 2 Multivariate logistic regression analysis of 1-month survival and 1-month neurologically favorable outcomes in terms of CPR duration

	1-month neurologically favorable outcome		1-month survival
Variables	Crude odds ratio (95% CI)	Adjusted odds ratio (95% CI)	Crude odds ratio (95% CI)	Adjusted odds ratio (95% CI)
CPR duration (continuous variable), per minute	0.873 (0.861–0.886), p < 0.001	0.911 (0.892–0.929), p < 0.001	0.903 (0.894–0.911), p < 0.001	0.925 (0.912–0.938), p < 0.001
CPR duration (ordinal variable)
0 to 10 min n = 372 (11.1%)	Reference	Reference	Reference	Reference
11 to 20 min n = 530 (15.8%)	0.241 (0.175–0.331), p < 0.001	0.402 (0.261–0.619), p < 0.001	0.259 (0.195–0.344), p < 0.001	0.287 (0.196–0.419), p < 0.001
21 to 30 min n = 837 (25.0%)	0.044 (0.028–0.068), p < 0.001	0.107 (0.059–0.195), p < 0.001	0.074 (0.054–101), p < 0.001	0.110 (0.070–0.172), p < 0.001
31 to 40 min n = 1006 (30.0%)	0.023 (0.013–0.039), p < 0.001	0.090 (0.045–0.181), p < 0.001	0.043 (0.030–0.060), p < 0.001	0.090 (0.055–0.146), p < 0.001
≥41 min n = 608 (18.1%)	0.016 (0.008–0.036), p < 0.001	0.044 (0.017–0.112), p < 0.001	0.030 (0.019–0.047), p < 0.001	0.043 (0.023–0.079), p < 0.001

Adjusted odds ratios were calculated controlling for the following factors: age, sex, initial cardiac rhythm, witness, bystander CPR, time interval from the call to response, pre-hospital return-of-spontaneous circulation, etiology of arrest, pre-hospital managements, and in-hospital managements
CI confidence interval, CPR cardiopulmonary resuscitation

ISSN: 1471-2253