- Research article
- Open Access
Awareness, attitudes, barriers, and knowledge about evidence-based medicine among family physicians in Croatia: a cross-sectional study
BMC Family Practice volume 21, Article number: 88 (2020)
Evidence-based medicine (EBM) aims to assist physicians in making medical decisions based on the integration of the current best evidence, clinical expertise, and patients’ values. Extensive research has been conducted regarding physicians’ awareness, attitudes, barriers, and knowledge about EBM. In Croatia, there is a lack of research on this topic, especially among family physicians (FP). The aim of this study was to assess the awareness, attitudes, barriers, and knowledge about EBM among FPs in Croatia after six years of educational activities organized and provided by Cochrane Croatia.
In a cross-sectional study, conducted in 2016, we offered to FPs in Croatia a printed or online validated questionnaire to assess attitudes toward and barriers when considering the use of EBM, awareness about sources of evidence, and their level of understanding of evidence-based medicine terminology. The physicians were approached during mandatory continuing medical education courses and through their professional associations. We compared results from two groups of physicians, one with family medicine specialization and the other without.
295 (14%) of all officially registered FPs responded to the questionnaire. Respondents were very positive toward the promotion and usage of EBM. 160 (67%) indicated that they did not have access to the Cochrane Library. The majority reported lack of time available for finding evidence (80%), and patients’ unrealistic expectations that influence doctors’ choice of treatment (72%). Between the two groups of physicians, more family medicine specialists reported time restrictions for finding evidence. The highest level of EBM terminology understanding was reported for study design terms, and the lowest for statistical terms.
This study demonstrated that FPs in Croatia had very positive attitudes toward the use of EBM, they agreed that EBM improves patient care, and they estimated that more than two thirds of their practice is EBM-based. Compared to the results of the first assessment of physicians in 2010, there was some increase in the level of EBM awareness among FPs. However, to further increase the quality of EBM practice in Croatia better access to EBM sources and further educational activities are needed.
Evidence-based medicine (EBM) is a paradigm for medical practice  where medical decisions are based on the integration of the current best evidence, clinical expertise and patients’ values [2, 3]. Over the last three decades, the concept of EBM was introduced and developed; it is now widely accepted among health professionals. The most recognized organization in the world which provides high quality EBM information is the Cochrane [1,2,3].
Regarding physicians and EBM, generally many studies indicate physicians’ positive attitudes towards the EBM and agree that practicing EBM improves patient care [4,5,6,7,8,9,10]. However, only about 50% of the physicians rated their clinical practices to be typically evidence-based [5, 11, 12]. It has been reported that more than half of physicians disagree with the notion that EBM is of limited value in primary care [5, 12]. A systematic review from 2013 also described physicians’ positive attitudes regarding EBM, and reported various EBM facilitators such as: respectful and reciprocal communication among doctors, positive attitudes of staff towards EBM, having supervisors as a point of reference for residents, etc. . Physicians with prior EBM training showed a significantly more positive attitude towards EBM .
Regarding the knowledge of EBM, a systematic review from 2013 indicated differences in EBM application among physicians which depended on what they had learned during medical education, their confidence in current management of patients’ conditions, their perceived fit of the evidence with local facilities, etc. . A study from Iran concluded that the knowledge score about EBM was higher in physicians with previous research experience and prior EBM training .
Although physicians in general have positive attitude towards the EBM [4,5,6,7,8,9,10, 13], many studies reported barriers to practicing EBM, especially among family physicians [15,16,17,18]. A recent systematic review  identified barriers to EBM practice related to evidence (lack of or too much available evidence; inadequate evidence), preferences and expertise of doctors (doubting the usefulness of EBM; personal experience; lack of knowledge), patients’ preferences (quality of the relationship with a patient; patients’ expectations and wishes) and family physicians (FP) setting (applicability of EBM regarding primary care patients and research population; busy workload; lack of managerial or institutional support; cost-effectiveness of EBM in practice).
A study about EBM awareness and knowledge among physicians (family physicians and hospital doctors) in Croatia published in 2010 reported low awareness about EBM and the Cochrane Library among all physicians (30%), and called for educational interventions . Although medical students in Croatia have formal EBM education included in undergraduate or postgraduate programs , Cochrane Croatia organizes educational activities in the promotion of EBM . These activities include promotion of EBM and Cochrane systematic reviews on family medicine meeting, online workshops on Cochrane systematic reviews (accredited by the Croatian Medical Chamber) and an annual Croatian Cochrane Symposium for health care workers.
The aim of this study was to assess, for the first time, the awareness, attitudes, barriers, and knowledge about EBM using a standardized questionnaire among family physicians in Croatia after six years of educational activities organized and provided by Cochrane Croatia.
Study design and settings
A cross-sectional survey was performed among FPs employed in primary care in Croatia. The primary health care system in Croatia is organized as a list-based system in which patients register with a single FP. There are two types of family physicians in Croatian health care – the first group consists of physicians who have completed only medical school (in this manuscript referred to as family doctors, FD), and the second group of physicians who specialized in family medicine after medical school by completing an accredited four-year family medicine residency (in this manuscript referred to as family medicine specialists, FMS). According to the official data from the Central Health Information System of Croatia, there were 2154 family physicians in 2016, with 1110 (52%) specialists . The participants were recruited in two ways: during mandatory continuing medical education courses (CME) where they were invited to participate and were handed the printed version of the questionnaire, or via e-mail notification which contained a link to the web version of the questionnaire. Online version of the questionnaire was set up via the SurveyMonkey® platform (SurveyMonkey Inc., Palo Alto, CA). The software did not collect respondents’ IP addresses and was completely anonymous. Professional societies of FPs (“KoHOM - Coordination of Croatian Family Medicine” and “HUOM – Croatian Association of Family Medicine”) distributed the online version of the questionnaire among their members. Participation in the survey was voluntary, and all participants were instructed not to fill the survey more than one time. The survey was conducted between April and September 2016. Due the different types of recruitment, we were not able to calculate the actual response rate but made the estimation according to the official number of employed FPs in Croatia.
The questionnaire was based on the questionnaire developed for family physicians , with an additional set of questions regarding sociodemographic, professional, and practice data adapted to the Croatian health care system. In order to investigate the understanding of technical terms used in EBM, we also used the questionnaire created by McColl et al. . EBM terms were organized in three groups, related to study design, statistics, and epidemiology. Each participant self-assessed his or her understanding of EBM terms. The questionnaire was piloted among 10 medical doctors and researchers affiliated with Cochrane Croatia, who tested the questionnaire to verify content, criterion-related and construct validity of the questionnaire. The questionnaire was in the Croatian language (English translation in the Supplementary material).
All data analyses were performed using IBM® SPSS Statistics for Windows® (version 23.0, IBM, Armonk, NY). The distribution of quantitative data was tested by Kolmogorov-Smirnov test. Quantitative data were presented as median and interquartile range (IQR). Qualitative data were presented as absolute and relative frequencies. Depending on the data, we performed Mann-Whitney U test or χ2-test to compare the responses between FMSs and FDs. The level of significance (P) was 2-tailed and P values < 0.05 were considered statistically significant.
In total, we had 295 (14%) respondents, with a predominance of women, 187 (79%). There were 146 (61%) FMSs and 91 (39%) FDs. The median age was 45 (33–53), with the significant difference between FMSs (50 (42–55) years) and FDs (32 (28–41) years). FMSs also had more work experience (24 (15-29) years) compared to FDs (6 (2-15) years). The participants mostly used computers at work for assessing health records of patients, issuing electronic medical prescription and referrals and for acquiring laboratory results of their patients (Table 1).
Awareness and attitudes of FPs about EBM
The participants had very positive attitude towards the promotion of EBM, and thought that EBM improves patient care delivery. They were also very positive about the attitudes of their colleagues toward the EBM, and reported that research findings were extremely useful in their daily management of patients. They estimated that about 70% of their clinical practice is based on EBM. They disagreed with the statement that EBM is of limited value in general practice due to lack of scientific foundation in primary care. However, the participants were neutral in regard to the statement that adoption of EBM imposes additional burden on already overloaded FPs (Table 2). There were no significant differences between FMSs and FDs for this part of the questionnaire.
The majority of participants (160 (67%)) reported that they did not have access to The Cochrane Library. Among those who had access, there were significantly more FMSs that were accessing The Cochrane library at home or at their medical office (χ2-test, p = 0.007). Although almost all participants (225 (95%)) declared that they were using online sources of medical information, the frequency of using the evidence to solve a problem in clinical practice for 203 (89%) participants was three times or less in the last three months. Our participants preferred using the evidence prepared by medical associations of interest, online summaries, and guidelines than assessing original articles or systematic reviews and meta-analysis. In general, the participants had positive attitude toward the different sources of evidence (Table 3).
Barriers in the use of EBM by FPs
Regarding the barriers in using EBM, the majority of participants reported the lack of time for finding evidence (188 (80%)), reading and assessing evidence (186 (79%)), discussing research results with the patients (190 (81%)), as well as patients’ unrealistic expectations that influence doctors’ choice of treatment (168 (72%)). FMSs more often reported lack of time for finding evidence as a barrier towards using EBM compared to FDs (χ2-test, p = 0.036). FMSs less often reported patients’ unrealistic expectations, and influence on choice of treatment (χ2-test, p = 0.05) or financial aspect of access to EBM sources (χ2-test, p < 0.001) as barriers to EBM practice (Table 4).
Understanding study design terms
Considering the understanding of study design terms in EBM, more than two-thirds of the participants had high level of understanding or understanding with the possibility to explain to the others. The lowest level of understanding was for a case control study (155 (66%)), and the highest was for a case report (229 (96%)). More FMSs reported higher levels of understanding for a cohort study (χ2-test, p = 0.007, Table 5).
Understanding statistical terms
The lowest understanding of statistical terms used in EBM was reported for interquartile range (76 (32%)), type I and II error (78 (33%)), and for mode (107 (45%)), while the highest level of understanding was reported for a representative sample (216 (92%)), precision and accuracy (196 (83%)), and standard deviation (194 (82%)). There was statistical difference between the groups for terms interquartile range (χ2-test, p = 0.006), standard deviation (χ2-test, p = 0.006), precision and accuracy (χ2-test, p = 0.002), and representative sample (χ2-test, p = 0.026) towards the better understanding of terms among FMSs. In addition, FMSs reported lower understanding of terms type I and type II errors (χ2-test, p = 0.005) (Table 6).
Understanding epidemiological terms
The participants expressed high level of understanding the epidemiological EBM terms. The lowest level of understanding was reported for odds ratio (133 (56%)), and the highest for sensitivity and specificity of the test (219 (92%)). Between the groups, there was no statistically significant difference in understanding any of epidemiological terms (Table 7).
Awareness and attitudes of FPs about EBM
To the best of our knowledge this is the first study about EBM awareness, and attitudes among family physicians in transitional countries within the southern east part of Europe, which have similar organizational structure of primary health care [22, 23]. Our study showed that family physicians in Croatia had a very positive attitude towards the use of EBM, which is consistent with previous studies [4,5,6,7,8,9,10, 13] and they strongly agreed that EBM improves patient care. Although the participants estimated that around 70% of their practice is EBM-based, this number could be overestimated, since the majority of participants (203 (89%)) responded that they used an original research article to solve a patient’s problem up to three times in the last three months. Rare usage of original research articles to solve a patient’s problem could be also be the reason why our participants strongly disagreed that EBM is of limited value due to the lack of evidence in general practice, which is not consistent with previous studies .
Information about sources of the evidence
Our participants preferred EBM sources prepared by relevant medical associations, online summaries, and guidelines rather than assessing EBM sources personally (original articles or systematic reviews and meta-analysis), which is in line with previous studies [11, 13, 16, 18]. This could be caused by the lack of time or knowledge for reading and understanding the reports of primary studies and systematic reviews. Participants reported that systematic reviews or meta-analysis were a useful EBM source, but still two-thirds of the participants indicated that they did not have access to The Cochrane Library, which presents the first obstacle in practicing EBM.
Compared to the study published in Croatia in 2010 , there is an overall increase in access and use of The Cochrane Library among FPs in Croatia. Today, only medical schools and university hospitals in Croatia have free access to The Cochrane Library, via Croatian Academic and Research Network (CARNet). The use of EBM, especially The Cochrane Library, could be increased if all the FPs could become members of CARNet. Our study also indicates that there was a modest progress in some aspects in the level of EBM awareness compared to the study from 2010 which could be related to the educational activities organized by Cochrane Croatia in terms of EBM promotion. Due to the small number of FP participants and a different questionnaire used in the 2010, we could not directly compare all results between these two studies.
Barriers in the use of EBM by FPs
Among barriers related to the FPs’ preferences and expertise (questions 4.1, 4.3, 4.5, 4.7 from the questionnaire), the participants did not report any of the barriers as significant or very significant. Only having skills for critical assessment of evidence was reported as a significant barrier. Although our findings are in line with previous studies included in a systematic review , this level of confidence could be the result of self-evaluation without any objective control.
This study showed that patient-related barriers (questions 4.2, 4.10 from the questionnaire) limit the use of EBM, especially when patients have unrealistic expectations that influence FPs choice of treatment. Previous studies also confirm that, in the situations where FPs choice of treatment does not match the wishes of patient, FPs could feel pressured from patients [11, 16, 17].
Regarding barriers related to the practice setting (questions 4.4, 4.6, 4.8, 4.9, 4.11), the most common barrier reported in this study and other studies is lack of time that FPs need to overcome in order to practice EBM .
Differences between FMSs and FDs regarding the barriers
We found a significant difference between FMSs and FDs regarding barriers in using EBM. The lack of time for finding evidence was found as a significant barrier to EBM practice for FMSs. The lack of specialist education is likely to result in a defensive approach i.e. more frequent referral to secondary health care, which is less time-consuming . Searching for evidence, appraising it, and discussing with the patient requires more time investment than simply referring a patient to a secondary health care, and this notion was demonstrated by FPs in this study. FMSs and FDs also differed in coping with unrealistic patient expectations as the main barrier to using EBM in practice, where those barriers were significantly more perceived by FDs. The aforementioned emphasizes the importance of doctors’ specialization for FPs, i.e. four-year training under the supervision of their mentors, usually family medicine specialists with high degree of experience [25, 26].
Knowledge of FPs about EBM
Generally, the participants reported high level of understanding of all EBM technical terms, especially FPs with specialization. The highest level of understanding was reported for study design terms while the lowest understanding was shown for statistical terms. FMSs had better understanding than FDs of interquartile range (IQR), standard deviation (SD), precision and accuracy, and representative sample. The reason for these differences could be the result of specialization training of FMSs. However, general low understanding of some basic statistical terms such as mode, IQR, P-value, and confidence interval raises doubt in adequate interpretation and critical appraisal of evidence sources that FPs might use in their everyday practice. Overall, compared to previous studies [5, 8], our participants achieved higher scoring in self-reported understanding technical terms used in EBM.
To be able to practice EBM, FPs need to have better training in research methodology principles, especially during formal medical education and postgraduate studies that also include specialization curricula. Various EBM training approaches were studied in order to encourage EBM use in physician practice [27,28,29,30,31,32,33], and they should include multifaceted, clinically integrated interventions in order to improve knowledge, skills, attitudes, and behavior amongst practicing health professionals . Recently, a group of authors proposed an “EBM competency framework for real-world general practice” which has been developed out of the empirical research while taking into account the constraints of today’s general practice, but further validation of this approach is needed .
Our study had several limitations. Our study sample was based on voluntary participation of FPs, and we had an unbalanced sample distribution between FPs with and without specialization (61% vs. 39%). Due to the lack of information, we could not confirm whether this distribution is similar in ratio to that of the national level. Voluntary participation in the study could have attracted more enthusiastic and motivated FPs, so that our results could be more positive compared to the whole population of employed FPs. However, we believe that a larger sample size would not greatly affect results in general. Another limitation is inherent to the survey study design. Our results could have been influenced by overestimation of FPs knowledge about EBM, because their knowledge was not assessed and only their opinion about EBM was questioned.
Our study demonstrated that FPs in Croatia had very positive attitudes toward the use of EBM, and they strongly agreed that EBM improves patient care. They estimated that more than two thirds of their practice is EBM-based. This could be overestimated, since the majority of participants were not often using an original research article to solve a patient’s problem. FPs preferred EBM sources prepared by relevant medical associations, online summaries and guidelines rather than assessing EBM sources personally. We found improvement in some aspects in the level of EBM awareness, compared to the similar study conducted in 2010 among medical doctors in Croatia.
Comparing FMSs and FDs, the significant difference was found in reporting barriers (lack of time to practice EBM and coping with patients’ unrealistic expectations), and in understanding EBM technical terms where specialist education and experience could be in favor of FMSs. The many barriers that that were reported in this study were already described in previous studies among family physicians, which indicates a great difficulty to overcome as they are consistently present to their regular working environment.
Finally, one of the solutions that could enhance the knowledge, attitudes, and awareness about EBM among family physicians is to provide them with free access to the EBM databases such as The Cochrane Library in primary care institutions and to offer them more educational activities that would promote and encourage EBM use in everyday practice.
Availability of data and materials
The datasets used during the current study are available from the corresponding author on reasonable request.
Continuing medical education
Family doctors (without specialization)
Family medicine specialist
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The authors wish to thank Katarina Madirazza and Peter Le for their help with language editing and proofreading of the manuscript and Prof. Livia Puljak, PhD for the advice regarding the improvement of our manuscript.
This work was supported by the Croatian Science Foundation [‘Professionalism in Health Care’] under Grant agreement No. IP-2014-09-7672 and by the Croatian Science Foundation [‘Professionalism in Health - Decision making in practice and research, ProDeM’] under Grant agreement No. IP-2019-04-4882; both to A.M. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Ethics approval and consent to participate
The study was approved by the Ethics Committee of the University of Split School of Medicine under the project “Professionalisms in Health” funded by the Croatian Science Foundation. There was an informed consent attached to the questionnaire. By filling the questionnaire, the participants gave their consent to participate in the research.
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Nejašmić, D., Vrdoljak, D., Bralić Lang, V. et al. Awareness, attitudes, barriers, and knowledge about evidence-based medicine among family physicians in Croatia: a cross-sectional study. BMC Fam Pract 21, 88 (2020). https://doi.org/10.1186/s12875-020-01162-5
- Evidence-based medicine
- Family physicians
- Quality of health care