BioMed Research International
Volume 2017 (2017), Article ID 3250485, 7 pages
https://doi.org/10.1155/2017/3250485

Research Article

Public Knowledge and Attitudes towards Bystander Cardiopulmonary Resuscitation in China

Meng Chen, Yue Wang, Xuan Li, Lina Hou, Yufeng Wang, Jie Liu, and Fei Han

Department of Anesthesiology, The Third Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150081, China

Correspondence should be addressed to Fei Han; fh.feih@yahoo.com

Received 15 October 2016; Revised 27 December 2016; Accepted 22 February 2017; Published 7 March 2017

Academic Editor: Eric Chong

Copyright © 2017 Meng Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract.

The rate of bystander CPR is much lower in China than in developed countries. This survey was implemented to assess the current status of layperson CPR training, to analyze the willingness of bystanders to perform CPR, and to identify barriers to improving bystander CPR rates. The questionnaire included individual information, current status of bystander CPR training, and individual’s willingness and attitude towards performing CPR. There were 25.6% laypersons who took CPR training. The majority (98.6%) of laypersons would perform CPR on their family members, but fewer laypersons (76.3%) were willing to perform CPR on strangers. Most respondents (53.2%) were worried about legal issues. If laws were implemented to protect bystanders who give aid, the number of laypersons who were not willing to perform CPR on strangers dropped from 23.7% to 2.4%. An increasing number of people in China know CPR compared with the situation in the past. CPR training in China is much less common than in many developed countries. The barriers are that laypersons are not well-trained and they fear being prosecuted for unsuccessful CPR. More accredited CPR training courses are needed in China. The laws should be passed to protect bystanders who provide assistance.

1. Introduction

Cardiac arrest is a substantial public health problem. Data from previous studies suggest that more than 3 million sudden cardiac deaths occur worldwide every year [1, 2], and survival is lower than 8% [3]. Unfortunately, 544,000 sudden cardiac deaths occur in China each year with survival of less than 1% [4]. Survival from sudden cardiac arrest in China is much lower than in many countries. Immediate bystander cardiopulmonary resuscitation (CPR) increases out-of-hospital cardiac arrest (OHCA) survival by twofold to threefold [5–7]. The chance of surviving OHCA falls by 7%–10% per minute without intervention [8].

The proportion and intensity of bystander CPR training vary in different countries. The main reason of the difference on bystander CPR training between countries is because of the various education and training system, such as CPR training as a part of the middle school curriculum and driver’s license acquisition [9–11]. The willingness of the laypersons in different countries to learn and perform CPR is also very important. No time and no interest to learn CPR, afraid of doing something wrong, a fear of legal liability, and other reasons are obstacles limiting bystander to learn and perform CPR [12–14]. More than half of the students in the United States learned CPR and automated external defibrillator [15]. In Norway, 89% secondary school students attended CPR training [12]. Seventy percent of people in Japan learned CPR, and 30% of people learned CPR more than two times [10]. However, CPR training among Chinese students is 27%, which was much lower than in developed countries [10, 12, 15, 16].

One or two decades ago, there were few CPR training for the public and students in China. Accredited CPR training courses were only for medical staff or emergency medical service related professions, such as firefighter. With the development of China and the improvement of civilization of Chinese society, CPR training courses by medical organization, television, Internet, newspaper, and other channels are developing recent years for the public and university students, but it is still not systematic. Because of the big population of Chinese people, organized training by government such as including the training as a part of senior school curriculum and driver’s license acquisition is needed to be established. Also, it is important to increase the willingness of the people to supply help to cardiac arrest victims. Several surveys were conducted to investigate the knowledge and attitudes of bystander CPR on Chinese students [16, 17]. However, few studies about bystander CPR towards the public were done in China. This survey was implemented to assess current status and effects of bystander CPR training on the public, to explore the willingness of bystanders to perform CPR, and to identify barriers to improve bystander CPR rate in China.

2. Methods

This study was approved by the ethics committee of the Third Affiliated Hospital, Harbin Medical University. The data of this survey was acquired by questionnaires distributed to the public of China through the Internet.

2.1. Questionnaire Design and Distributing

The questionnaire consisted of three sections with a total of 19 questions including individual information, current status and effects of CPR training, attitude on CPR training, and willingness to providing help in emergency situation. The questionnaires were released at https://www.sojump.com from May 9 to 19, 2014. This website is one of the largest websites which provide a platform for researchers who design and release questionnaires to make all kinds of survey on the public of China. The website has over 2.6 million volunteer members in China. The questionnaires were distributed randomly to volunteer members by email invitation. There was no conflict of interest between the volunteer members and the survey. The website automatically screened IP addresses to ensure that the questionnaire was answered only once from each IP address. The website automatically ruled out answers if the feedback for the whole questionnaire was less than 2 minutes or more than 30 minutes. The time limitations are calculated automatically by the website of https://www.sojump.com according to the number and content of the questions of the questionnaire. The website provided the email address and IP address of each returned questionnaire to make sure each answered questionnaire had a reachable respondent and was credible.

2.2. Data Analysis

Percentages were calculated for the frequencies. The difference between groups was analyzed with Chi-square tests or Fisher exact tests. values < 0.05 were considered significantly different. All statistics were processed with SPSS for Windows 17.0 (SPSS Inc., Chicago, IL, USA).

3. Results

A total of 2102 answered questionnaires were collected by May 19, 2014. Eight questionnaires were ruled out because of obvious contradictive answers. Among the valid respondents (Table 1), 87.9% were laypersons (compared with medical related person). The questionnaires answered by laypersons (1841) were selected for final analysis in this study.

Table 1: Characteristics of the respondents.

All
Medical related person
Layperson

Respondents
2094 (100.0%)
253 (12.1%)
1841 (87.9%)

Gender

    Male
1005 (48.0%)
100 (39.5%)
905 (49.2%)

    Female
1089 (52.0%)
153 (60.5%)
936 (50.8%)

Age, y

    <18
3 (0.1%)
0 (0%)
3 (0.2%)

    18–25
494 (23.6%)
51 (20.2%)
443 (24.1%)

    26–45
1500 (71.6%)
196 (77.5%)
1304 (70.8%)

    46–60
93 (4.4%)
6 (2.4%)
87 (4.7%)

    >60
4 (0.2%)
0 (0%)
4 (0.2%)

Education level

    <associate’s degree
76 (3.6%)
3 (1.2%)
73 (4.0%)

    Associate’s degree
359 (17.1%)
37 (14.6%)
322 (17.5%)

    Bachelor’s degree or above
1659 (79.2%)
213 (84.2%)
1446 (78.5%)

3.1. Individual Information

Among the layperson respondents, 49.2% were male and 50.8% were female, 99.6% were between 18 and 60 years old, and 78.5% had a bachelor’s degree or above, 17.5% had associate’s degree, and 4.0% had educational level of lower than associate’s degree.

3.2. Current Status and Effects of CPR Training

Among the layperson respondents, 90.1% understood what is CPR and 25.6% were trained by CPR courses (Table 2). However, among the trained laypersons, 50.8% knew the standard CPR procedure and believed they had the ability to perform CPR, and 49.2% knew the procedure only but they did not believe they had the ability to perform CPR on victims (Table 3). The top three reasons for not attending CPR training courses were not knowing where to take the training (54.7%), a lack of time (20.1%), and a lack of concern (10.7%). Sixty-six point one percent of laypersons believed they had the ability to learn and perform CPR, and 79.1% believed that a lifeless person without breath and/or heartbeat could be saved. Female had less confidence than male (). The favorable methods for the laypersons to learn CPR were medical staff teaching (44.9%) or the qualified CPR training courses (27.8%). Fifty-six point one percent of laypersons were willing to pay for the CPR training courses.

Table 2: Current status and attitude of layperson towards CPR training.

Layperson responses
All
Male
Female
value

Understanding what is CPR

0.645

    Yes
1658 (90.1%)
818 (90.4%)
840 (89.7%)

    No
183 (9.9%)
87 (9.6%)
96 (10.3%)

CPR training

0.110

    Yes
472 (25.6%)
247 (27.3%)
225 (24.0%)

    No
1369 (74.4%)
658 (72.7%)
711 (76.0%)

Reasons for not attending CPR training

0.044

    Do not know where the training is
749 (54.7%)
352 (53.5%)
397 (55.8%)

    Lack of time
275 (20.1%)
148 (22.5%)
127 (17.9%)

    Not concerned
147 (10.7%)
74 (11.2%)
73 (10.3%)

    Costs
118 (8.6%)
56 (8.5%)
62 (8.7%)

    Others
80 (5.8%)
28 (4.3%)
52 (7.3%)

The way to learn CPR

<0.001

    Teaching by medical staff
826 (44.9%)
414 (45.7%)
412 (44.0%)

    Accredited CPR training courses
511 (27.7%)
210 (23.2%)
301 (32.2%)

    TV or internet
290 (15.8%)
164 (18.1%)
126 (13.5%)

    Health education lectures
161 (8.7%)
91 (10.1%)
70 (7.5%)

    Books, newspapers, and magazines
35 (1.9%)
16 (1.8%)
19 (2.0%)

    Others
18 (1%)
10 (1.1%)
8 (0.9%)

Do you want to pay for the qualified and professional CPR training

0.007

    Yes
1032 (56.1%)
534 (59.0%)
498 (53.2%)

    No
258 (14.0%)
131 (14.5%)
127 (13.6%)

    Uncertain
551 (29.9%)
240 (26.5%)
311 (33.2%)

Do you believe you have ability to learn and perform CPR

<0.001

    Yes
1217 (66.1%)
627 (69.3%)
590 (63.0%)

    No
151 (8.20%)
83 (9.2%)
68 (7.3%)

    Uncertain
473 (25.7%)
195 (21.5%)
278 (29.7%)

Do you believe a lifeless person without breath and/or heartbeat can be saved

<0.001

    Yes
1456 (79.1%)
738 (81.5%)
718 (76.7%)

    No
61 (3.3%)
38 (4.2%)
23 (2.5%)

    Uncertain
324 (17.6%)
129 (14.3%)
195 (20.8%)

Top 5 professions to learn CPR

0.278

    Medical staff
1786 (97.0%)
873 (96.5%)
913 (97.6%)

    Firefighter
1578 (85.7%)
785 (86.7%)
793 (84.7%)

    Police officer
1396 (75.8%)
708 (78.2%)
688 (73.5%)

    Driver and steward
1217 (66.1%)
578 (63.9%)
639 (68.3%)

    Tour guide
913 (49.6%)
426 (47.1%)
487 (52.0%)

, statistically significant difference between genders for each question.

Table 3: The effects of layperson CPR training.

Layperson responses
All
Male
Female
value

Trained

0.469

    Know procedure and can perform CPR
239 (13.0%)
129 (14.3%)
110 (11.8%)

    Know the procedure but cannot perform CPR
233 (12.6%)
118 (13.0%)
115 (12.3%)

Not trained

0.939

    Know the procedure
322 (17.5%)
152 (16.8%)
170 (18.2%)

    Know a little
733 (39.8%)
354 (39.1%)
379 (40.5%)

    Unknown
314 (17.1%)
152 (16.8%)
162 (17.3%)

value, compared between genders for each question.

3.3. Willingness to Perform CPR

If there was a cardiac arrest victim, 59.5% of laypersons stated that they would ask for help and perform CPR to rescue the victim simultaneously, 22.8% chose to ask for help only and wait for rescue, 14.9% chose to perform CPR only, and 2.6% did not know what to do (Table 4). In case of cardiac arrest, 54.0% of laypersons expected to be resuscitated by anybody nearby immediately and 46.0% of laypersons expected to be resuscitated by the medical staff or trained people only. The majority (98.7%) of laypersons chose to perform CPR on their family members when they were confronted with cardiac arrest. However, fewer laypersons (76.3%) were willing to perform CPR on strangers in comparison with family members. There was significant difference in the attitudes of the layperson on family members compared with strangers (). With hesitation to rescue strangers, 53.2% of the respondents were worried about legal issues, and 44.4% worried about inadequate knowledge. Interestingly, the most important thing that man worried about was legal issues (59.3%), and their second concern was inadequate knowledge and skill in performing CPR (38.0%). By contrast, woman worried more about inadequate knowledge and skill in CPR (50.5%), and their second concern was legal issues (47.3%). There was significant difference in the most concerned thing when performing CPR between man and woman (). Most people (58.9%) believed they would not prosecute bystanders for liability if bystander CPR on their family members failed, 13.7% would, and 27.3% were not sure. Woman had less willingness on prosecuting for liability on bystanders whose CPR failed compared with man (). In case laws were implemented to protect bystander who gave aid, the number of laypersons who were not willing to perform CPR on strangers dropped from 23.7% to 2.4% ().

Table 4: Layperson responses to the hypothetical cardiac arrest scenarios.

Layperson responses
All
Male
Female
value

If you find someone who has cardiac arrest, you will

0.002

    Ask for help and perform CPR
1096 (59.5%)
562 (62.1%)
534 (57.1%)

    Ask for help only
420 (22.8%)
174 (19.2%)
246 (26.3%)

    Perform CPR only
274 (14.9%)
149 (16.5)
125 (13.4)

    Do not know how to do
48 (2.6%)
19 (2.1%)
29 (3.1%)

    Others
3 (0.2%)
1 (0.1%)
2 (0.2%)

If you experience cardiac arrest in public area, the person you wish to perform CPR on you

0.806

    Bystander
994 (54.0%)
486 (53.7%)
508 (54.3%)

    Medical staff or trained people only
847 (46.0%)
419 (46.3%)
428 (45.7%)

When you witness a family member/stranger confronting cardiac arrest, you will perform CPR to

0.094

    Both of them
1395 (75.8%)
696 (76.9%)
699 (74.7%)

    Family member only
421 (22.9%)
192 (21.2%)
229 (24.5%)

    Stranger only
10 (0.5%)
6 (0.7%)
4 (0.4%)

    Neither
15 (0.8%)
11 (1.2%)
4 (0.4%)

While performing CPR on a stranger, you will worry about

<0.001

    Legal issues
980 (53.2%)
537 (59.3%)
443 (47.3%)

    Inadequate knowledge and skill of CPR
817 (44.4%)
344 (38.0%)
473 (50.5%)

    Disease transmission
33 (1.8%)
18 (2.0%)
15 (1.6%)

    Others
11 (0.6%)
6 (0.7%)
5 (0.5%)

If a family member has cardiac arrest, but bystander CPR failed, will you prosecute for liability

<0.001

    Yes
252 (13.7%)
140 (15.5%)
113 (12.1%)

    No
1085 (58.9%)
560 (61.9%)
525 (56.1%)

    Uncertain
503 (27.3%)
205 (22.7%)
298 (31.8%)

If laws were implemented to prevent prosecuting for liability, will you perform CPR on strangers

0.029

    Yes
1629 (88.5%)
812 (89.7%)
817 (87.3%)

    No
45 (2.4%)
26 (2.9%)
19 (2.0%)

    Uncertain
167 (9.1%)
67 (7.4%)
100 (10.7%)

, statistically significant difference between genders for each question.

4. Discussion

Bystander CPR is the most significant factor for OHCA survival. Bystander CPR rates are below 50% on average, and the rates vary between different countries according to reports [18–20]. Bystander CPR occurs less than 6% of OHCA in China [21]. For the purpose of improving the rate of bystander CPR and the ability of the layperson to perform CPR, this study was performed to find out the current status and effects of CPR training, to understand attitudes of layperson towards bystander CPR, and to uncover the barriers to improving bystander CPR rates in China. This study showed 90% of laypersons understood what is CPR in China. One-fourth of the laypersons were trained by different kinds of CPR courses. Thirteen percent of laypersons knew the standard CPR procedure and believe they had ability to perform CPR. The primary reason for layperson not learning CPR was that they did not know where to find a CPR training course. When confronting possible cardiac arrest victims, almost all laypersons chose to perform CPR on their family members, whereas a significantly decreased percentage of respondents chose to perform CPR on strangers. Bystander CPR provided by citizens is fundamentally based on goodwill and conscience towards strangers. The awareness should be emphasized by the appropriate education system. Furthermore, the primary reasons preventing bystanders from supplying help were inadequate knowledge and legal issues. It is important to set up more accredited CPR training courses in China. There are no laws to protect bystanders who are supplying help from being prosecuted in case CPR fails in China. If laws were implemented to protect bystanders who give aid, the number of laypersons who were not willing to perform CPR on strangers dropped 90%.

This study showed that the number of people who understood what is CPR was greatly extended than 7 years ago (90% versus 55%) [16]. However, layperson CPR training (25.6%) in China is still lower than most developed countries, such as Sweden (54.4%) [22], Slovenia (69.4%) [11], United States (54.1%) [23, 24], Australia (58%) [25], and New Zealand (76%) [26]. In Norway, basic life support (BLS) training was up to 89% among secondary school students [12]. In Japan, more than 70% people attended CPR training [10, 27]. Nevertheless, 26.8% of laypersons attended BLS training in Korea and 21% in Hong Kong, which is similar to the data in our study [13, 28].

This study showed that the primary reasons for layperson not attending the CPR training courses were “not knowing where are the CPR training courses” and “a lack of time and concern.” The cost was not considered to be a major problem to learn CPR by the respondents. The reasons for not taking CPR training courses were the same as those noted in Belgium [14]. Although CPR training was very common, the same problems were also reported in Norway [12]. Slovenia has a rather high percentage of CPR-trained layperson, which is related to mandatory CPR training during driver’s license acquisition [11]. Approximately 50 years ago, BLS was recommended as part of the school curriculum with compulsory resuscitation training in Norwegian schools [12]. CPR training is part of school law for high school graduation in approximately 20 states in the USA at present. In Japan, the percentage of high school students who had previous CPR training courses was 59% [10]. Only 27% of Chinese middle school students learned CPR from television and books, but not from accredited or formal CPR training courses [16]. University students in nonmedical related specialties in China were not required to take CPR theory or technique practice training [17]. These reports indicated that compulsory CPR training organized by government was recommended to be added to the educational system of middle school and college curriculum and driver’s license acquisition to improve the ability of bystanders to perform CPR in China, which had been established many years ago in Norway, United State, Japan, and Slovenia who are good performers of bystander CPR.

Nearly half of the laypersons who were trained of CPR believed they knew the procedure only but could not perform CPR which suggested that the quality of CPR training was not satisfactory. Berden et al. reported that reinstruction at six-month intervals is needed to maintain adequate skills in CPR [29]. Similar situations were also reported in other surveys [10, 12, 13]. All Norwegian children went through one BLS course during middle school, but only 73% of the students could recall what they learned about BLS training after several years [12]. In Japan, approximately 30% of respondents attended CPR training more than twice, but some of them believed they had poor knowledge and lacked the ability to perform CPR [10]. CPR training was shown to play an important role in improving recognition of a patient with cardiac arrest [11]. Repeated and effective CPR training increased bystander’s confidence and willingness to perform CPR [10, 13]. Multiple CPR training is needed for the public to provide high-quality CPR.

In this study, nearly all laypersons chose to perform CPR on their family member. However, significantly fewer respondents were willing to perform CPR on strangers. In this hesitancy to resuscitate strangers, legal issue was the number one concern of respondents. The second bystander’s scruple was inadequate knowledge and skill in performing CPR. These findings were consistent with a survey from Taiwan in 2013 [30]. The first two concerns among the Norwegian students were little knowledge of BLS and a fear of harming the victims [12]. Poor knowledge/performance was the most important anxiety among Japanese teachers/students [10]. The most important thing that Chinese respondents worried about was legal issues, but poor knowledge was prior concern among laypersons of Norwegian. One of the major reasons of this difference was because there were laws to protect people who provide aid to victims in many countries, such as United States, Canada, and many European countries. These laws protect people who supplied help, as in the case of the “Good Samaritan” Law, which offers legal protection to people who give reasonable assistance to those who are injured or ill, encourage people to offer assistance, and reduce bystander hesitation to assist for fear of being sued or prosecuted for unintentional injury or wrongful death [31]. However, no relevant laws have been passed to protect people who provide help from prosecution because of failed resuscitation in China. A similar report was also published in Korea in 2010, showing that, among the respondents who declined to perform standard CPR, the majority of them cited a fear of legal liability before “Good Samaritan” legislation was passed by the government of Korea [13]. According to our study, if laws were implemented to protect bystanders who gave aid, more respondents were willing to provide help to strangers. Interestingly, males worried more about legal issues, while females concerned more about inadequate knowledge and skill of CPR. Furthermore, males reported significantly higher confidence than females in learning and performing CPR in our study, which was consistent with a previous report [12]. On the basis of these reports and the results of this study, the laws should be passed in China to encourage the people and protect the person who supply help to victims without any delay or hesitation.

5. Limitations

Our study has several limitations. First, this survey was released through a website to respondents who were registered volunteer members. The person who answered the questionnaire usually paid more attention to CPR. Therefore, there was a volunteer bias in this study. Second, only 2102 questionnaires were collected in this study, so the results of this survey are difficult to be generalized to the greater Chinese population. However, the volunteer people who finished the survey are from all over the country, including all ages with the ability to answer the questionnaires, and including all kinds of education levels and occupations. This study still showed very important information about the current status of bystander CPR training on Chinese average people in all ages and occupations, because previous studies on bystander CPR training in China were almost done on Chinese students. Third, most of respondents were between 18 and 60 years old and many of them had bachelor’s degree or above. The education of the people who answered the questionnaire is above the average level of Chinese. These individuals might have more motivation and opportunity to learn and practice CPR. Thus, the data presented in this study might be optimal than the reality.

6. Conclusions

An increasing number of people understood what is CPR compared with the situation in the past with the rapid developing of the society of China. However, layperson CPR training and bystander CPR rate in China are still less common than in many developed countries. People are willing to learn and perform CPR to victims. The barriers are that laypersons are not well-trained and have fear of being prosecuted responsibility for unsuccessful CPR. Because repeated and effective CPR training are important to increase bystander’s confidence and willingness to perform CPR, multiple CPR training is needed for the public to provide high-quality CPR. Besides, the awareness should be emphasized by the appropriate education system to motivate people to supply help in emergency situation. The laws protecting laypersons who provide reasonable aid are needed to be made to encourage people to offer assistance without any hesitation in China.

Conflicts of Interest

The authors declare that they have no conflicts of interest.

Authors’ Contributions

Meng Chen and Yue Wang contributed equally to this work. Meng Chen, Yue Wang, Xuan Li, Lina Hou, and Fei Han conceived and designed the experiments. Meng Chen, Yue Wang, and Xuan Li performed the experiments. Meng Chen, Yue Wang, Xuan Li, Lina Hou, Yufeng Wang, and Jie Liu analyzed the data. Meng Chen, Yue Wang, Xuan Li, and Fei Han wrote the paper. All authors read and approved the final manuscript.

Acknowledgments

The authors thank Laerdal Medical, China, for supporting this work. This study was also supported by the Nature Science Foundation, Department of Science and Technology, Heilongjiang, China (LC2012C40), and the fund of the Third Affiliated Hospital, Harbin Medical University, China (JJZD2014-02).

References

G. Boriani, C. Valzania, I. Diemberger et al., “Potential of non-antiarrhythmic drugs to provide an innovative upstream approach to the pharmacological prevention of sudden cardiac death,” Expert Opinion on Investigational Drugs, vol. 16, no. 5, pp. 605–623, 2007.

M. E. Josephson and H. J. J. Wellens, “Implantable defibrillators and sudden cardiac death,” Circulation, vol. 109, no. 22, pp. 2685–2691, 2004.

C. Sasson, M. A. M. Rogers, J. Dahl, and A. L. Kellermann, “Predictors of survival from out-of-hospital cardiac arrest: a systematic review and meta-analysis,” Circulation: Cardiovascular Quality and Outcomes, vol. 3, no. 1, pp. 63–81, 2010.

W. Hua, L.-F. Zhang, Y.-F. Wu et al., “Incidence of sudden cardiac death in China. Analysis of 4 regional populations,” Journal of the American College of Cardiology, vol. 54, no. 12, pp. 1110–1118, 2009.

T. Nishi, T. Maeda, K. Takase, T. Kamikura, Y. Tanaka, and H. Inaba, “Does the number of rescuers affect the survival rate from out-of-hospital cardiac arrests? Two or more rescuers are not always better than one,” Resuscitation, vol. 84, no. 2, pp. 154–161, 2013.

Y. Tanaka, J. Taniguchi, Y. Wato, Y. Yoshida, and H. Inaba, “The continuous quality improvement project for telephone-assisted instruction of cardiopulmonary resuscitation increased the incidence of bystander CPR and improved the outcomes of out-of-hospital cardiac arrests,” Resuscitation, vol. 83, no. 10, pp. 1235–1241, 2012.

T. Iwami, T. Kawamura, A. Hiraide et al., “Effectiveness of bystander-initiated cardiac-only resuscitation for patients with out-of-hospital cardiac arrest,” Circulation, vol. 116, no. 25, pp. 2900–2907, 2007.

M. P. Larsen, M. S. Eisenberg, R. O. Cummins, and A. P. Hallstrom, “Predicting survival from out-of-hospital cardiac arrest: a graphic model,” Annals of Emergency Medicine, vol. 22, no. 11, pp. 1652–1658, 1993.

S. Holmberg, A. Hondley, J. Bohr et al., “Guidelines for basic life support: a statement by the Basic Life Support Working Party of the European Resuscitation Council, 1992,” Resuscitation, vol. 24, no. 2, pp. 103–110, 1992.

T. Taniguchi, W. Omi, and H. Inaba, “Attitudes toward the performance of bystander cardiopulmonary resuscitation in Japan,” Resuscitation, vol. 75, no. 1, pp. 82–87, 2007.

R. Rajapakse, M. Noč, and J. Kersnik, “Public knowledge of cardiopulmonary resuscitation in Republic of Slovenia,” Wiener Klinische Wochenschrift, vol. 122, no. 23-24, pp. 667–672, 2010.

B. K. Kanstad, S. A. Nilsen, and K. Fredriksen, “CPR knowledge and attitude to performing bystander CPR among secondary school students in Norway,” Resuscitation, vol. 82, no. 8, pp. 1053–1059, 2011.

G. C. Cho, Y. D. Sohn, K. H. Kang et al., “The effect of basic life support education on laypersons' willingness in performing bystander hands only cardiopulmonary resuscitation,” Resuscitation, vol. 81, no. 6, pp. 691–694, 2010.

N. Mpotos, E. Vekeman, K. Monsieurs, A. Derese, and M. Valcke, “Knowledge and willingness to teach cardiopulmonary resuscitation: a survey amongst 4273 teachers,” Resuscitation, vol. 84, no. 4, pp. 496–500, 2013.

B. Bogle, S. Mehrotra, G. Chiampas, and A. Z. Aldeen, “Assessment of knowledge and attitudes regarding automated external defibrillators and cardiopulmonary resuscitation among American University students,” Emergency Medicine Journal, vol. 30, no. 10, pp. 837–841, 2013.

Z.-Q. Chen, Y. Zhao, Z.-H. Lu et al., “Awareness and attitudes of Chinese students towards cardiopulmonary resuscitation,” Emergency Medicine Journal, vol. 27, no. 12, pp. 907–910, 2010.

C. Lu, Y. Jin, F. Meng et al., “An exploration of attitudes toward bystander cardiopulmonary resuscitation in university students in Tianjin, China: a survey,” International Emergency Nursing, vol. 24, pp. 28–34, 2016.

C. Vaillancourt, J. Grimshaw, J. C. Brehaut et al., “A survey of attitudes and factors associated with successful cardiopulmonary resuscitation (CPR) knowledge transfer in an older population most likely to witness cardiac arrest: design and methodology,” BMC Emergency Medicine, vol. 8, article 13, 2008.

B. S. Abella, T. P. Aufderheide, B. Eigel et al., “Reducing barriers for implementation of bystander-initiated cardiopulmonary resuscitation: a scientific statement from the American Heart Association for healthcare providers, policymakers, and community leaders regarding the effectiveness of cardiopulmonary resuscitation,” Circulation, vol. 117, no. 5, pp. 704–709, 2008.

D. L. Isbye, L. S. Rasmussen, C. Ringsted, and F. K. Lippert, “Disseminating cardiopulmonary resuscitation training by distributing 35 000 personal manikins among school children,” Circulation, vol. 116, no. 12, pp. 1380–1385, 2007.

Y. Ge, M. Cai, K. Sun, X. Li, L. Jiang, and Y. Lu, “The current status analysis of bystander-initiated cardiopulmonary resuscitation for out-of-hospital cardiac arrest,” Chinese Journal of Critical Care Medicine, vol. 5, pp. 477–480, 2015 (Chinese).

Å. B. Axelsson, J. Herlitz, S. Holmberg, and A.-B. Thorén, “A nationwide survey of CPR training in Sweden: foreign born and unemployed are not reached by training programmes,” Resuscitation, vol. 70, no. 1, pp. 90–97, 2006.

R. Swor, I. Khan, R. Domeier, L. Honeycutt, K. Chu, and S. Compton, “CPR training and CPR performance: do CPR-trained bystanders perform CPR?” Academic Emergency Medicine, vol. 13, no. 6, pp. 596–601, 2006.

J. Urban, H. Thode, E. Stapleton, and A. J. Singer, “Current knowledge of and willingness to perform Hands-Only™ CPR in laypersons,” Resuscitation, vol. 84, no. 11, pp. 1574–1578, 2013.

T. Celenza, H. C. Gennat, D. O'Brien, I. G. Jacobs, D. M. Lynch, and G. A. Jelinek, “Community competence in cardiopulmonary resuscitation,” Resuscitation, vol. 55, no. 2, pp. 157–165, 2002.

M. M. Parnell, J. Pearson, D. C. Galletly, and P. D. Larsen, “Knowledge of and attitudes towards resuscitation in New Zealand high-school students,” Emergency Medicine Journal, vol. 23, no. 12, pp. 899–902, 2006.

K. Shibata, T. Taniguchi, M. Yoshida, and K. Yamamoto, “Obstacles to bystander cardiopulmonary resuscitation in Japan,” Resuscitation, vol. 44, no. 3, pp. 187–193, 2000.

S. Y. Chair, M. S. Y. Hung, J. C. Z. Lui, D. T. F. Lee, I. Y. C. Shiu, and K. C. Choi, “Public knowledge and attitudes towards cardiopulmonary resuscitation in hong kong: telephone survey,” Hong Kong Medical Journal, vol. 20, no. 2, pp. 126–133, 2014.

H. J. J. M. Berden, F. F. Willems, J. M. A. Hendrick, N. H. J. Pijls, and J. T. A. Knape, “How frequently should basic cardiopulmonary resuscitation training be repeated to maintain adequate skills?” British Medical Journal, vol. 306, no. 6892, pp. 1576–1577, 1993.

N.-C. Chen, Y.-S. Huang, E. P. Huang et al., “Public knowledge and attitude toward cardiopulmonary resuscitation in Taiwan: a national telephone survey,” Circulation, vol. 128, article A126, 2013.

M. N. Rader, “The ‘Good Samaritan’ in Jewish law. Lessons for physicians, attorneys, and laypeople,” The Journal of Legal Medicine, vol. 22, no. 3, pp. 375–399, 2001.