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Japanese Women Are Less Likely To Get a CPR From The Bystanders

by Rishika Gupta on March 26, 2019 at 11:17 PM
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Japanese Women Are Less Likely To Get a CPR From The Bystanders

Bystanders in Japan are more likely to not give CPR to women in public places as compared to men, finds a new study. The results of this study are published in the journal of Mayo Clinic Proceedings.

A large Japanese study of sex-based disparities in treating out-of-hospital cardiac arrest found that women under 65 were less likely to receive bystander CPR in public locations than men.

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Japanese women under 65 are less likely to receive cardiopulmonary resuscitation (CPR) by bystanders when they suffer a sudden cardiac arrest in a public location compared to in a residential location, report investigators in Mayo Clinic Proceedings, published by Elsevier. They speculate that cultural attitudes may influence bystanders and propose that correct knowledge of CPR and a better understanding of sex-based disparities are needed to facilitate public health intervention.

Out-of-hospital cardiac arrest (OHCA) is a major public health problem in industrialized countries, affecting more than 350,000 individuals in the United States and 123,000 individuals in Japan each year. Around 1,000 adults suffer from sudden cardiac arrest in prehospital settings each day in the US alone, and only one in nine OHCA victims survives to hospital discharge.
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Bystander CPR is associated with improved outcomes in prehospital settings, and international guidelines on resuscitation emphasize its importance as one of the essential components of the "chain of survival." However, recent studies have highlighted sex-based disparities, pointing out that women suffering cardiac arrest in a public location were less likely to receive bystander CPR.

"The reasons for this sex-based disparity should be better understood to facilitate public health intervention," explained Tasuku Matsuyama, MD, Ph.D., Department of Emergency Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan who led the investigation.

Dr. Matsuyama and colleagues report on a large nationally-representative group of almost 85,000 patients from the All-Japan Utstein Registry from January 1, 2013, to December 31, 2015. They examined the rates and outcomes associated with bystander CPR as a function of a patient's sex. The analysis included adult patients aged 18 years and older with OHCA of medical origin in public or residential locations, witnessed by bystanders. As in earlier studies, women had lower rates of shockable arrest rhythms and were less likely to receive advanced life support interventions.

During the study period, 373,359 OHCAs were registered, and 84,734 cases were eligible for analysis. Overall, around 54 percent of women and 57 percent of men received bystander CPR in a public location, and 46.5 percent of women and 44 percent of men received bystander CPR in residential locations.

Women had a higher likelihood of receiving bystander CPR in a residential location. In public locations, women aged 18-64 years were less likely to receive bystander CPR. When witnessed by a non-family member, women were less likely to receive bystander CPR regardless of age.

Reasons for lower rates of bystander CPR among certain subgroups of women in this study remain uncertain, but the investigators speculate that in Japan, bystander CPR including the use of an automated external defibrillator on a woman has the potential to result in being accused of sexual assault. "Cultural factors, specific to Japan, may influence bystander attitude toward patients of different sex. Therefore, it may be difficult to increase the rates of CPR on non-family, young victims unless laypersons have confidence in legal protections in Japan," commented Dr. Matsuyama. "While we acknowledge that our findings may not be generalizable to other patient populations or countries, similar findings were reported in a recent North American study."

Their data show that younger women may miss the opportunity to receive one of the most important treatments for cardiac arrest because of some obstacles unique to young women. Correct knowledge of cardiopulmonary resuscitation may improve the chances for more young women; therefore it is important to disseminate the importance of bystander CPR particularly for young women.

In an accompanying editorial, Jacob C. Jentzer, MD, FACC, Assistant Professor of Medicine, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA, and colleagues point out that similar findings were reported in the International Cardiac Arrest Registry. They agree these may relate to inherent biases and differences in social norms. In addition, they note lower utilization of other potentially-beneficial therapies in women after OHCA in several studies, with worse survival in women compared to men.

"This study highlights the importance of bystander CPR as a key component of the 'chain of survival' for OHCA victims, emphasizing the need for public health interventions to ensure adequate CPR training among laypeople," commented Dr. Jentzer. "Additional studies are needed to determine why these sex-based differences occur, to ensure that all patients with a witnessed OHCA can receive this crucial therapy, which can increase the likelihood of neurologically-intact survival."

Source: Eurekalert
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