1992年,循证医学(evidence-based medicine,EBM)倡导者提出新"范式",即卫生研究证据是对个体病人及卫生系统决策的最好基础.该方法原意是拟除去传统医学知识体系仅关注疾病本身的病理生理过程及临床经验的积累,因此在2001年被lt;纽约时代杂志gt;评为最具影响力的理论之一.本文回顾了循证医学的产生、发展、哲学局限性和临床实践的挑战.指出EBM的演变、发展早已超出它原来(误解的)概念,即EBM有可能替代传统医学.EBM现正力求去增强而不是替代个人的临床经验及了解疾病的机制.并且EBM一定要继续发展、并探讨一系列的问题包括加强科学基础,伦理道德的重要性及其有关传播及应用的实际事务.例如,为了促进科学研究成果用于临床,证据往往都是从经选择过的人群的不完整证据而来,这些人群仅能从那些贵重技术中得到一些边缘性的好处.而证据的应用就会把这些有限的好处普遍化,由此引发出一系列问题即有多少人和谁能用得起这些新的疗法.因此循证医学的倡导者希望医生及用户关注那些来自临床研究、有效且适于临床应用的好证据.而要达到此目标还需做很多的工作.
Objective We searched the Cochrane Library（Issue 3, 2005 ）to identity evidence related to palliative treatment. We found that Opioids are effective for the palliation of breathlessness in terminal illness. Oral Morphine and hydromorphone is effective for cancer pain. Radiotherapy and Bisphosphonates can relief pain secondary to bone metastases. Corticosteroids can resolve malignant bowel obstruction in advanced gynaecological and gastrointestinal cancer.
ObjectivesTo systematically review the application of evidence-based medicine (EBM) combined with problem-based learning (PBL) method in clinical teaching.MethodsDatabases including WanFang Data, CNKI, VIP, CBM, PubMed and EMbase were searched to identify eligible randomized controlled trials that compared EBM plus PBL with traditional lecture based learning (LBL) method in clinical teaching from inception to March 28th, 2020. Two reviewers independently screened literature, extracted data and assessed risk bias of included studies. Statistical analysis was performed using Stata 14.0 software.ResultsA total of 33 randomized controlled trials with 2 855 students were included. The results showed that students in EBM combined with PBL group obtained better scores of specialized theory (WMD=6.87, 95%CI 5.08 to 8.66, P<0.001), skills examination (WMD=10.57, 95%CI 8.98 to 12.16, P<0.001) and case analysis (WMD=9.79, 95%CI 4.71 to 14.88, P<0.001), comparing with those in LBL group. Besides, EBM combined with PBL method improved students’ overall ability including independent learning capability, clinical thinking ability, problem-solving capability, literature exploring capacity, communication and presentation skills and team-work ability.ConclusionsApplication of EBM combined with PBL method can improve clinical teaching quality.
Based on the site visit on the current application and practice of evidence-based medicine in USA, we find the difference between China and USA so as to further promote and plan the development of evidence-based medicine in China.
ObjectiveTo evaluate the quality of the clinical practice guidelines of acupuncture in China, in order to identify the status quo and challenges in the development of guidelines. MethodsWe evaluated the quality of the 5 clinical practice guidelines of acupuncture in China through the guideline appraisal instrument "Appraisal of Guidelines for Research and Evaluation Ⅱ" (AGREE Ⅱ). Four appraisers rated 6 domains of each guideline independently. ResultsFrom the assessment with AGREE Ⅱ, the mean scores of the six domains were as follows: "scope and purpose"55%, "stakeholder involvement" 27%, "rigor of development" 4%, "clarity of presentation" 55%, "applicability" 4%, and "editorial independence" 1%. ConclusionThe quantity of acupuncture guidelines is small and their quality is low due to the lack of methodological issues.
As one of the most sophisticated research methods of evidence-based medicine, systematic review is an activity of collecting, arranging and analyzing medical information. The methodological characteristics of systematic review reflect the value orientation of this activity. By analyzing and summarizing these characteristics, this paper points that the process of systematic review reflects the value orientation of attaching importance to obtaining universal information sources, treating individual information in an add-weight way, discretion in interpreting results and updating of time-limited information in medical information activities.
Objective To evaluate the quality of clinical studies on dentistry from the Chinese Journals. Methods Clinical studies in Chinese Journal of Conservative Dentistry of 2002 were searched. The quality of the clinical studies on assessment of treatments’ efficacy was evaluated. Results Among 204 related studies from 12 issues, there were 93 (45.58%) restrospective intervention studies, 6 randomized controlled blinded trials (2.94%), 42 randomized trials without blindness (20.58%), 20 controlled trials without randomization (9.80%) and 25 clinical observational studies (12.25%). The statistical analysis showed that 20 studies were with inappropriate methods. Conclusions It is necessary to improve the design and statistical analysis of clinical studies on stomatology in China to produce high-quality research evidence.
Objective To investigate the situation and problems of medical evidence-based medicine （EBM） teaching in China. Methods One hundred and four participants from different hospitals or universities of China in 2005 “Evidence-Based Medicine Teachers Advanced Training Workshop Ⅱ of Ministry of Education” were investigated. A selfcomplete questionnaire on EBM teaching was given at the registration. Results Seventy five questionaires from responders who came from 50 medical institutions of 18 provinces and 25 cities were available for analysis, representing a response rate of 72%. The average age of responders were 38 years old, and 61.3% were graduates. And 14 hospitals or universities have given EBM courses. Namely, for the postgraduates in 9 universities, undergraduates in 2 universities, physicians, nurses and medical managers in 2 hospitals. The lectures lasted from 8 to 36 hours in different units. Di~culties were：lack of EBM teachers, and better understanding the concept and approach of EBM, less paid attention by policy makers, and too busy in specialty. Conclusion EBM teaching is blooming in medical universities in China. It is needed for us to train high qualified EBM teachers.
Objective More and more women without child and female adolescents are undergoing medical abortion (MA), MA effect on subsequent pregnancy has been brought into focus. This research will evaluate the effect of MA on subsequent pregnancy. Methods To searched Medline, Embase, Cochrane Library, Chinese Biomed-database, correlative websites and nine Chinese medical journals. The studies that were included in the reference list were additionally searched. Only RCTs (randomized control trials), CCTs (clinical control trials) and prospective cohort studies were included. Two researchers evaluated the quality of the literature and combined the evidence independently. Revman 4.1 was used for meta-analysis. Results Eight prospective cohort studies with 2 934 cases were included. The incidences of miscarriage, postpartum hemorrhage and placental abnormality occurred in MA group were significantly lower than those occurred in SA group, and their OR (with 95%CI) were 0.42 (0.22 to 0.83), 0.58 (0.39 to 0.85) and 0.68 (0.54 to 0.87), respectively. No other significant differences were observed between the two artificial abortions groups. Though the tendency indicates that medical abortion has a probable influence on subsequent pregnancy, there was no significant difference about subsequent pregnancy between MA and first pregnancy. Conclusion Unnecessary abortion should be avoided. MA is safer than SA on subsequent pregnancy, so MA is the preferred option for women without child and female adolescent to terminate their unwilling pregnancy. However, as all the studies included were prospective cohort studies, further high-quality RCTs should be conducted.