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Self-perceived knowledge, attitude, and practice of evidence-based medicine before and after training among healthcare workers in Taizhou, China

BMC Medical Education volume 24, Article number: 700 (2024) Cite this article

Abstract

Background

Evidence-based medicine (EBM) is the combination of the best research evidence with our clinical expertise, specific situations, and the unique values of our patients. It is essential to evaluate the effectiveness of EBM training for healthcare workers (HCWs).

Objectives

This study aims to assess the impact of EBM training on HCWs’ knowledge, attitude, and practice (KAP) related to EBM.

Methods

A self-reported online survey was carried out to investigate KAP related to EBM among HCWs at a tertiary hospital in Taizhou, China. HCWs participated in EBM training on 9 and 10 September 2023. The questionnaire survey was conducted to understand KAP related to EBM before and after the training, and to compare and analyze the results before and after the training. The R software (version 4.1.0) was used to analyze data.

Results

Sixty-four HCWs completed the survey with a response rate of 52.5% (64/122). The overall average scores of KAP related to EBM before training were 55.3, 63.0, and 34.5, respectively, and 56.9, 66.5, and 34.7 were the scores of KAP after training. HCWs’ scores of knowledge (P = 0.033) and attitude (P < 0.001) related to EBM improved significantly after the training.

Conclusion

This study implied that EBM training may improve the knowledge and attitude of HCWs, and its teaching effect is considerable.

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Introduction

Evidence-based medicine (EBM) is defined as “the careful, explicit, and intelligent use of the best evidence in making decisions about patient care” [1]. In recent decades, the concept of EBM has penetrated clinical, nursing, and other medical and health fields, and has become one of the disciplines advocated by international clinical medicine [2]. It is also known that EBM can help healthcare workers (HCWs) integrate the latest study evidence into their clinical practices [3]. It is important for HCWs to adopt EBM to provide cost-effective and safe care, as combining individual clinical expertise with the best currently available external clinical evidence and patient values facilitates the clinical decision-making process. The systematic reviews performed by the Cochrane Library denote the gold standard for EBM practice [4].

EBM has been adopted in many medical care professions such as clinical diagnosis, occupational therapy, and nursing [5]. To practice EBM, individuals should develop clear clinical study questions, search for study information, critically evaluate the study evidence obtained, determine the applicability of the evidence to patients’ care, and evaluate the overall performance. However, implementing evidence-based practice in daily clinical practice is a complex and challenging process [6, 7]. The previous study indicated that the knowledge and attitude related to EBM were associated with the practice of EBM [8].

In recent decades, a large number of EBM training approaches have been studied to encourage the application of EBM in medical practice [9,10,11]. The purpose of EBM training is to enable the subjects to have the concept of EBM in medical practices, and to establish a new medical decision-making model that integrates the best study evidence, scientific clinical experience, and patients’ wishes. The common training methods were varied such as research courses, problem-based, small groups, online learning, or distance education [12]. For example, a well-designed EBM course was established for undergraduate medical education in the previous training [13]. In addition, to improve the skills of EBM, a problem-based method was presented, whereby students presented a focused clinical question and gave a presentation through contact with real patients during their recent clinical practice [14, 15].

Previous research mainly focused on the effectiveness of EBM training for medical students, while only a few studies concentrated on the knowledge, attitude, and practice (KAP) of EBM among HCWs in China. To ensure that healthcare users can enjoy good medical care in the future, it is necessary to effectively incorporate EBM-related KAP into educational programs for HCWs. The aim of this study was to compare HCWs’ KAP changes before and after EBM training, so as to evaluate the effect of EBM training and provide scientific suggestions for EBM teaching and reform.

Methods

Ethical approval

This research was waived from informed consent by the Ethical Review Committee of Taizhou Hospital, Zhejiang Province, China and the study was approved by the Ethical Review Committee of Taizhou Hospital, Zhejiang Province, China (Approval number: K20231021). Information about all participants was recorded anonymously. All procedures were conducted according to the guidelines of our institutional Ethics Committee and in compliance with the principles of the Declaration of Helsinki.

Study design and participants

This study was a cross-sectional experimental investigation along with before and after training assessment. The target population in the EBM training was HCWs at a medical center in Taizhou, China. This group of people want to continue to improve their research capabilities. The goal of this training was to improve the awareness and attitude of healthcare professionals towards EBM, so as to better practice EBM. We designed an online survey to evaluate their KAP before and after the training, respectively. The largest online survey platform in China named Wen-Juan-Xing platform (Changsha Ranxing Information Technology Co., Ltd., Hunan, China) was used to collect data about KAP related to EBM before and after the training. HCWs received the questionnaire via WeChat or e-mail, and they responded to the questionnaire by accessing the Uniform Resource Location (URL) or scanning a Quick Response (QR) code on their cell phones or computers.

Educators

Theoretical teaching and practical operation were provided by four faculty members who were experts on EBM and biostatistics.

Intervention

To improve the capacity of EBM among HCWs, it is important to understand the basic approaches of epidemiology and biostatistics, as these skills are commonly used in conducting, analyzing, and reporting medical studies [16, 17]. In this study, the educational intervention consisted of a module of lessons centered on the theme of EBM course was conducted at the Taizhou Hospital of Zhejiang Province, Taizhou, China. This teaching carried out a 2-day EBM training course from September 9 to 10, 2023, which consisted of theoretical teaching and practical operation.

The main contents of the training courses included the following aspects. (1) Clinical research design, including condensing clinical science problems, designing research protocols, determining observation indicators, selecting research objects, estimating sample size, and designing statistical analysis protocols; (2) Data management in clinical research implementation, including case report form (CRF), database design, data entry and sorting; (3) International paper reporting standards; (4) EBM literature review, including the concept, method, and quality level of EBM literature review; (5) Statistical analysis for clinical research, including cross-sectional study, case-control study, cohort study, mediation analysis, path analysis, and structural equation; (6) Meta-analysis methods for EBM research. Among the training courses, (1)–(4) were theoretical teaching and (5)–(6) combined with practical operation, based on SPSS and RevMan software. The details of course programs and training schedules were presented in Table 1. Flowchart of the EBM education training intervention for HCWs could be found in Fig. 1.

Table 1 Training details
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Fig. 1
figure 1

Flowchart of the EBM education training intervention for healthcare workers

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Study tool

The main contents of the questionnaire contained basic demographic information, KAP related to EBM, EBM resources, and statistical terms based on the previous research [8, 18, 19]. In this study, the survey mainly includes the following aspects. (1) Socio-demographic information: including age, sex, education, occupation, professional technical title, total service years, and previously undergone training courses in EBM. (2) Knowledge related to EBM. Knowledge of EBM was evaluated by 15 items with 5 optional answers: “Strongly agree”, “Agree”, “Neutral”, “Disagree” or “Strongly disagree”. (3) Attitudes toward EBM. Attitudes toward EBM were measured by 17 items and assessed similarly. (4) EBM practices: This section consisted of 11 items. Five possible answers were used to evaluate each item statement: “Always”, “Often”, “Sometimes”, “Seldom”, or “Never”. (5) Knowledge and use of common resources in EBM. (6) Knowledge and use of common statistical terms in EBM. The details could be found in the Supplementary Material.

Measures

All data collected were extracted directly from the Wen-Juan-Xing platform into an MS Excel spreadsheet and coded appropriately to make them suitable for statistical testing. Each item was scored based on the Likert scale method. Take knowledge related to EBM as an example, the 5-point Likert scale was adopted to give 1 ~ 5 points for each item from strongly disagree, disagree, neutral, agree, and strongly agree, respectively. Of note, reverse scoring was used for negatively worded items. In total, scores of 15 items of EBM knowledge were added up in a range of 15 ~ 75 points. In addition, the scores of EBM attitudes were calculated similarly with a range of 17 ~ 85. For EBM practice, the 5-point Likert scale was also used to give 1 ~ 5 points for each item from always, often, sometimes, seldom, and never, respectively. The total score was generated by taking the sum of all items and the range score was 11 ~ 55. A higher score indicated a higher level of EBM knowledge, attitude, or practice.

Statistical analysis

Categorical variables for basic demographic information were reported in frequency and percentage. To compare the performance related to EBM before and after the training, the Chi-square test was adopted. The descriptive statistics for continuous variables were also calculated, including mean values and standard deviations. The Kolmogorov-Smirnov test was used to assess the normality of quantitative variables. For normally distributed variables, the difference in KAP scores related to EBM before and after the training was compared using the t-test. While the Wilcoxon signed-rank test was used for non-normally distributed variables. Variables were considered statistically significant with a p-value < 0.05. Statistical calculations were performed via R software (version 4.1.0).

Results

Basic characteristics

A total of 122 HCWs applied to attend the EBM training. Among them, 86 HCWs answered the questionnaire before the training. Finally, sixty-four HCWs completed the two questionnaires, with a response rate of 52.5% (64/122) (Fig. 2).

Fig. 2
figure 2

Flowchart of the study participants

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The basic characteristics were presented in Table 2. The median age of participants was 35 years old and those who were older than 35 accounted for 48.4%. More than half the subjects (70.3%) were females. Respondents who had bachelor’s degrees and postgraduate degrees accounted for 64.1% and 35.9%, respectively. Subjects’ occupational categories include doctor (19, 29.7%), nurse (26, 40.6%), medical technician (13, 20.3%), and administration (6, 9.4%). HCWs who obtained professional titles including primary grade or below, medium grade, and senior grade accounted for 20.3%, 57.8%, and 21.9%, respectively. 57.8%% of the participants had more than 10 total service years. Most of the HCWs (64.1%) had not undergone any training courses in EBM previously.

Table 2 Basic characteristics (n = 64)
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Knowledge about EBM

In total, the mean total scores for the knowledge of EBM before and after training were 55.3 and 56.9, respectively (Table 3). Compared with the score before training, HCWs obtained a significantly higher average score after training (P = 0.033). The average scores for each statement of the knowledge domain before and after training ranged from 2.4 to 4.4 and 2.7 to 4.6, respectively. There were significant differences between the mean scores of EBM knowledge before and after training in the statements K4 and K13. Take statement K4 for example, the mean (sd) of EBM knowledge before and after training was 2.9 (1.0) and 3.3 (1.2), respectively. For the statement K13, the mean (sd) of EBM knowledge before and after training was 4.0 (0.6) and 4.2 (0.7), respectively. From the descriptive statistics of the level of HCWs’ knowledge about EBM before training, we found that the top three levels were awarded to the statements K9, K12, and K1. While the lower three levels were awarded to the statements K10, K3, and K4. In addition, for the scores of knowledge about EBM after training, the top three were K9, K6, and K8, while the lower three levels were K10, K7, and K3.

Table 3 Participants’ knowledge of EBM
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Attitude towards EBM

The descriptive statistics of attitudes toward EBM among HCWs before and after the EBM training were presented in Table 4. On the whole, the average total score for the attitude towards EBM after training was significantly higher than before (66.5 > 63.0, P < 0.001). The average scores for each item of the attitude domain before and after training ranged from 2.6 to 4.5 and 2.7 to 4.5, respectively. From the descriptive statistics of the level of HCWs’ attitude towards EBM, we found that the top three levels were awarded to the statements A3, A15, and A5, while the lower three levels were A14, A10, and A6. The top three levels after training were A15, A3, and A13, while the lower three were A10, A12, and A14. In addition, HCWs obtained higher mean scores for individual statements of the attitude domain after the EBM training. There were significant differences between the mean scores of attitude towards EBM before and after training in the statements A1, A6, A7, A13, A14, and A15. Take statement A1 (I believe that evidence-based medicine is a threat to good clinical practice) for example, the mean scores of attitude towards EBM before and after training were 2.8 and 3.2, respectively.

Table 4 Participants’ attitude toward EBM
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Practice of EBM

Table 5 reported the basic statistics of the practice of EBM among HCWs before and after the EBM training. In total, the average total scores before and after training were 34.5 and 34.7, respectively. The average scores for each statements of the practice domain before training ranged from 2.1 to 3.6. We found that the top level was awarded to the statement P7 and the mean (sd) was 3.6 (1.0). While the lower level was awarded to the statement P10, with a mean (sd) 2.1 (1.3). Similarly, the average scores of the practice domain after training ranged from 1.9 to 3.7. The top level was P7, while the lower level was P10.

Table 5 Participants’ practice of EBM
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Awareness of EBM resources and statistical terms

Tables 6 and 7 summarized the details of respondents’ responses toward EBM resources and statistical terms. The overall awareness of the most used EBM resources after training performed better than before training (Table 6). There was a significant difference between the two time groups, including the awareness of Bandolier, Cochrane database of systematic reviews, Best practice, Medicine (McGraw Hill), and Google Scholar. For Clinical evidence, PubMed/Medline, and Up to date, no significant difference was found. According to the survey data, except for systematic review and number needed to treat, more than 40% of the participants did not understand the common concepts such as relative risk, absolute risk, odds ratio, meta-analysis, clinical effectiveness, confidence interval, heterogeneity, and publication before the EBM training (Table 7). After the EBM training was completed, approximately more than 80% of the HCWs fully or partially understood the above concepts, which had statistical significance compared with that before the training.

Table 6 Participants’ awareness of EBM resources
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Table 7 Participants’ awareness of statistical terms
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Discussion

EBM represents the development direction of modern medical education and has a great impact on clinical practice, health management, and medical education. Generally, previous studies have concentrated on the KAP of EBM among healthcare providers. Only a few studies focused on evaluating the performance of KAP before and after EBM training. This study evaluated the changes in KAP of HCWs before and after EBM training, and evaluated the teaching effect of EBM training through a questionnaire survey of medical staff who participated in EBM training.

Previous research has provided evidence that evidence-based healthcare teaching could lead to improvements in the knowledge, attitude, and skill of EBM [20]. This study showed a moderate level of KAP of EBM. The total average score of knowledge after EBM training was significantly higher than the score obtained before training. This could be explained that our intervention had some positive short-term effects on the participants in terms of EBM. A positive attitude is an essential requirement for HCWs, and previous research has demonstrated that positive attitudes among primary care professionals are related to better medical care delivery [21, 22]. Previous research reported that respondents with positive attitudes toward EBM accounted for a higher proportion [23, 24]. However, some studies have found unsatisfactory attitudes among the doctors who participated in their studies [25]. Similarly, this study also found that the total average score of attitude after EBM training was significantly higher than the score obtained before training. This finding was in line with the previous research that the physician who participated EBM training previously would have a significantly more positive attitude toward EBM [26]. In our study, no significant difference was found in the practice of EBM between the two-time points. This could be explained that the participants cannot change, or cannot observe if they changed, their practice in two days. In studies conducted before, there were only approximately 50% of the physicians rated their medical practices to be typically evidence-based [27, 28].

In this survey, we found that the commonly utilized EBM resources adopted by participants in clinical decision-making were “PubMed” and “Up to Date”. Our findings were consistent with the previous studies that indicated “PubMed” was the most utilized EBM resource [29, 30]. The EBM resource “Up to date” was also found as the most utilized tool in the previous research [31]. This finding, however, was different from the survey in the UK, in which “Bandolier” was found to be the most used EBM resource [32]. Although there was a significant increase in the awareness of statistical terms after EBM training, the proportion of the respondents who could understand and explain the related statistical terms to others was still low. Less than 30% of participants could understand and explain the related statistical terms to others, such as “relative risk” (17.2%), “absolute risk” (10.9%), “systematic review” (29.7%), “odds ratio” (20.3%), and “meta-analysis” (26.5%). This proportion was lower than the previous studies [30, 33]. In addition, a survey carried out among resident physicians in hospitals in Syria reported that a lower proportion of awareness of the terms “relative risk” (11.7%), “systematic review” (10.3%), “odds ratio” (6.5%), and “meta-analysis” (4.7%) [18]. These differences might be due to the diversity of HCWs responded to, as the current study participants included HCWs in a variety of job categories.

There were still some limitations that should be noticed. First, the biases associated with self-reported surveys, including subjective and exaggerated reports and recollections, cannot be ignored. Participants might provide an over or under-assessment in the questionnaire, since the study was based on their self-assessment of the survey. Second, the study sample was based on the voluntary participation of HCWs. Voluntary participation in the survey could have attracted more enthusiastic and motivated HCWs, so that the results could be more positive. In addition, the sample size was not large enough, hence, further study with a larger sample size was needed to verify the finding. Third, we did not collect data on the validity of the data collection tool. Therefore, the findings should be interpreted by keeping this important limitation in mind. Besides, considering that the data was derived from self-perceived KAP, utilizing knowledge tests and observing performance would provide more valuable findings. Fourth, this study was only based on clinical practice and did not consider any educational theories, models, or frameworks in relation to the intervention design. Fifth, considering this study was a single group pre- and post-test design, there might be a test-retest bias. Six, considering that it is difficult to observe changes in the practice of EBM in the short term, the content provided in training can only indirectly affect the practice, and large follow-up studies are needed to measure changes in EBM practice in the future. Finally, although this study explored the KAP of EBM, the barriers to EBM practice have not been elaborated. Hence, using mixed-method surveys or focused group discussions to investigate the barriers to EBM practice was recommended in future research.

Conclusion

This study implied that EBM training may improve the knowledge and attitude of HCWs, and its teaching effect is considerable.

Data availability

The datasets generated and/or analyzed during the current study are available from the corresponding author on request.

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Acknowledgements

We would like to thank participants for their cooperation and support. We appreciate the support of the Continuing Education Project of Zhejiang Province (ID: 2023-12-05-007).

Funding

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Author information

Authors and Affiliations

  1. Evidence-based Medicine Center, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai, Zhejiang, China

    Chengwen Luo, Mei-Xian Zhang & Tao-Hsin Tung

  2. Department of Hematology, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai, China

    Yu-pei Yang

  3. Taizhou Institute of Medicine, Health and New Drug Clinical Research, Taizhou, China

    Tao-Hsin Tung

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Contributions

CW Luo: Conceptualization, Data curation, Software, Methodology, Visualization, Investigation, Writing- Original draft preparation, Writing- Reviewing and Editing. MX Zhang: Data curation, Methodology, Conceptualization, Writing- Reviewing and Editing. YP Yang: Data curation, Methodology, Conceptualization, Writing- Reviewing and Editing. TH Tung: Conceptualization, Data curation, Software, Methodology, Supervision, Validation, Writing- Original draft preparation, Writing- Reviewing and Editing. All authors edited, reviewed, and approved the final manuscript.

Corresponding author

Correspondence to Tao-Hsin Tung.

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Ethics approval and consent to participate

This research was waived from informed consent by the Ethical Review Committee of Taizhou Hospital, Zhejiang Province, China and the study was approved by the Ethical Review Committee of Taizhou Hospital, Zhejiang Province, China (Approval number: K20231021).

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Not applicable.

Competing interests

The authors declare no competing interests.

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Luo, C., Zhang, MX., Yang, Yp. et al. Self-perceived knowledge, attitude, and practice of evidence-based medicine before and after training among healthcare workers in Taizhou, China. BMC Med Educ 24, 700 (2024). https://doi.org/10.1186/s12909-024-05678-7

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