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Association of neighborhood characteristics with bystander-initiated CPR

. 2012 Oct 25;367(17):1607-15. doi: 10.1056/NEJMoa1110700. Association of neighborhood characteristics with bystander-initiated CPR

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Association of neighborhood characteristics with bystander-initiated CPR

Comilla Sasson et al. N Engl J Med. 2012.

. 2012 Oct 25;367(17):1607-15. doi: 10.1056/NEJMoa1110700. Collaborators Affiliation

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Abstract

Background: For persons who have an out-of-hospital cardiac arrest, the probability of receiving bystander-initiated cardiopulmonary resuscitation (CPR) may be influenced by neighborhood characteristics.

Methods: We analyzed surveillance data prospectively submitted from 29 U.S. sites to the Cardiac Arrest Registry to Enhance Survival between October 1, 2005, and December 31, 2009. The neighborhood in which each cardiac arrest occurred was determined from census-tract data. We classified neighborhoods as high-income or low-income on the basis of a median household income threshold of $40,000 and as white or black if more than 80% of the census tract was predominantly of one race. Neighborhoods without a predominant racial composition were classified as integrated. We analyzed the relationship between the median income and racial composition of a neighborhood and the performance of bystander-initiated CPR.

Results: Among 14,225 patients with cardiac arrest, bystander-initiated CPR was provided to 4068 (28.6%). As compared with patients who had a cardiac arrest in high-income white neighborhoods, those in low-income black neighborhoods were less likely to receive bystander-initiated CPR (odds ratio, 0.49; 95% confidence interval [CI], 0.41 to 0.58). The same was true of patients with cardiac arrest in neighborhoods characterized as low-income white (odds ratio, 0.65; 95% CI, 0.51 to 0.82), low-income integrated (odds ratio, 0.62; 95% CI, 0.56 to 0.70), and high-income black (odds ratio, 0.77; 95% CI, 0.68 to 0.86). The odds ratio for bystander-initiated CPR in high-income integrated neighborhoods (1.03; 95% CI, 0.64 to 1.65) was similar to that for high-income white neighborhoods.

Conclusions: In a large cohort study, we found that patients who had an out-of-hospital cardiac arrest in low-income black neighborhoods were less likely to receive bystander-initiated CPR than those in high-income white neighborhoods. (Funded by the Centers for Disease Control and Prevention and others.).

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Figures

Figure 1. Predicted Probability of Bystander-Initiated Cardiopulmonary…

Figure 1. Predicted Probability of Bystander-Initiated Cardiopulmonary Resuscitation (CPR)

The predicted probability of bystander-initiated CPR…

Figure 1. Predicted Probability of Bystander-Initiated Cardiopulmonary Resuscitation (CPR)

The predicted probability of bystander-initiated CPR is shown according to the proportion of black residents in a neighborhood (Panel A) and the median household income in a neighborhood (Panel B). The model that was used to calculate the predicted probability of bystander-initiated CPR included the following covariates: age (in decades), race or ethnic group, sex, witnessed or unwitnessed arrest, public or private location, and the six categories of neighborhood median household income and racial composition (low-income black, low-income integrated, low-income white, high-income black, high-income integrated, and high-income white).

Figure 2. Predicted Probability of Bystander-Initiated CPR…

Figure 2. Predicted Probability of Bystander-Initiated CPR According to the Median Income and Racial Composition…

Figure 2. Predicted Probability of Bystander-Initiated CPR According to the Median Income and Racial Composition of the Neighborhood

Point estimates with 95% confidence intervals, indicated by I bars, are shown. The predicted probabilities were missing for six census tracts and 93 individual patients.

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