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Aim To better understand the current status and barriers to making basic life support a common practice among the citizens of Kawasaki City, Japan. Method We extracted data according to the Utstein‐style guidelines specifically regarding out‐of‐hospital cardiac arrests (OHCAs) of cardiac etiology. The items were as follows: (i) OHCA witnessed by a citizen, (ii) the victim received bystander cardiopulmonary resuscitation (CPR), (iii) an automatic external defibrillator was used by the witness. We compared the rate of each item and the 1‐month survival rates with the national average in Japan. We further divided Kawasaki City into three areas and compared each item. We also examined the rate of bystander CPR in each time period and location. Statistical analysis was carried out using the χ2‐test and Fisher's test. Results The 1‐month survival rates did not differ significantly from the national average for cases meeting conditions (i)–(iii): (i) 14.0% versus 13.3%, (ii) 19.1% versus 16.4%, (iii) 71.4% versus 53.3%, respectively. However, the rate of condition (i) was significantly lower (47.5% versus 55. 8%, P = 0.01). The rate of condition (ii) was higher in the northern area of Kawasaki City, as well as in a location other than the home in the daytime. The rate of condition (ii) was low in the home. Conclusions Although the 1‐month survival rates of OHCAs witnessed by citizens in Kawasaki City did not differ significantly from the national average, the low rate of bystander CPR was notable, especially in the southern and middle areas of the city and when the location was in the home, which implies that basic life support knowledge should be spread to these areas.

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