本指南由時任ESVS大會副主席Marianne De Maeseneer女士，全權授權予紀永威教授(中國臺灣)將歐洲慢性靜脈疾病診療指南，為海峽兩岸及港澳地區以及其他使用中文服務于患者的醫生同業提供無償服務。紀教授邀請陳忠教授、符偉國教授、郭偉教授三位教授共同編譯，連續連載，為廣大醫療專業人士提供重要的資源，幫助他們根據最新的臨床證據為CVD患者制定個性化的治療方案。   

☆4.證據和建議標準☆

    歐洲心臟病學會（European Society of Cardiology，ESC）體系用于對證據和建議進行分級。A、B或C反映了當前證據的級別(表1)，每個建議的強度分為Ⅰ、Ⅱa、Ⅱb或Ⅲ級(表2)。

    為了制定建議，我們考慮了現有證據的優勢和局限、益處和危害以及對臨床實踐的適用性。在正文中討論了研究方法局限性的細節、主要和次要結果的適當性以及研究結果的一致性。

☆5.證據表☆

    委員會成員在證據表（Tables of Evidence,ToEs）中提供了選定文章的摘要，用于支持不同建議的證據。這些表格可以作為補充材料在網上獲得。

☆  4. Evidence and Recommendations criteria. ☆ 

        The European Society of Cardiology (ESC) system was used for grading evidence and recommendations. A, B, or C reflects the level of current evidence (Table1) and the strength of each recommendation was then determined to be class I, IIa, IIb, or III (Table 2).

       To formulate recommendations, the strengths and limita tions of the available evidence were considered, as well as benefit versus harm and applicability to clinical practice context. Details of study methodology limitations, appropri ateness of primary and secondary outcomes, and consistency of results across studies were discussed in the main text.

☆ 5. Tables of Evidence. ☆

       The members of the GWC provided summaries of the selected articles, used to support the evidence for the different recommendations, in Tables of Evidence (ToEs). These ToEs are available online, as Supplementary Material.