Search tips
Search criteria 


Logo of ccforumBioMed CentralBiomed Central Web Sitesearchsubmit a manuscriptregisterthis articleCritical CareJournal Front Page
Crit Care. 2010; 14(Suppl 1): P309.
Published online 2010 March 1. doi:  10.1186/cc8541
PMCID: PMC2934519

Time factors rather than type and/or nature of CPR modify the prognosis of out-of-hospital cardiac arrests witnessed by bystanders


The purpose of the study was to analyze the effects of the type and nature of CPR on the prognosis of out-of-hospital cardiac arrests (OHCAs).


We analyzed 1,612 OHCAs, witnessed by citizens and handled by the dispatch system in Ishikawa, Japan, from 1 April 2003 to 31 March 2008. Bystander CPR was classified into four groups according to type (CC only or CC + MMV) and nature (under one's own initiative or telephone-assisted instruction).


The presence of bystander CPR significantly augmented the 1-month survival rate. However, there were no significant differences among the four groups of CPR. The multivariate logistic regression analysis identified three time factors including intervals of collapse-to-call, call-to-first CPR, call-to-arrival to patients as independent factors associated with 1-month survival. See Figures Figures11 and and22.

Figure 1
Effect of bystander CPR on the 1-month survival rate.
Figure 2
Factors associated with 1-month survival


Significance of correctable time factors rather than type of CPR should be considered in the future guideline revision.

Articles from Critical Care are provided here courtesy of BioMed Central