Matching for independent ROSC after cardiac arrest score variables yielded 319 matched cases from the study period (January 2007-March 2011). The score predicted a 45 % ROSC rate for the matched pairs. The observed ROSC increased significantly with chest compression quality management, to 52 % (P = 0.013; 95 % CI, 46-57 % ). No significant differences were seen in the conventional CPR group (47 % ; 95 % CI, 42-53 % ). The difference between the observed ROSC rates was not statistically significant.
Chest compression quality management leads to significantly higher ROSC rates than those predicted by the prognostic score (ROSC after cardiac arrest score). Matched-pair analysis shows that with conventional CPR, the observed ROSC rate was not significantly different from the predicted rate. Analysis shows a trend toward a higher ROSC rate for chest compression quality management in comparison with conventional CPR. It is unclear whether a single aspect of chest compression quality management or the combination of training, real-time feedback, and debriefing contributed to this result.