中文摘要：

目的 研制适合我国患者使用的重症肌无力（MG）严重程度新量表的初始量表.方法 根据4个常用的MG严重程度量表建立条目池,采用Delphi法调查国内MG领域专家的意见,选择专家推荐一致性好且前期评价好的条目,建立初始量表.结果 核心小组拟定的条目池包含来自上述4个量表的19个条目.两轮专家调查的积极系数分别为91.4%（32/35）和96.9%（31/32）;专家权威系数分别为0.79和0.80.专家对条目综合评分的Kendall协同系数分别为0.22（χ^2=127.01,P〈0.01）和0.42（χ^2=231.56,P〈0.01）.初始量表包括10个条目,涉及眼外肌、球部肌、面肌、四肢肌、中轴肌和呼吸肌6个肌群.结论 采用Delphi法结合前期条目评价筛选出代表性条目,形成了全面反映MG严重程度的初始量表.

英文摘要：

Objective To develop the preliminary version of a new scale on the severity of myasthenia gravis （ MG） suitable for Chinese patients .Methods The item pool was established based on the four widely used MG severity scales .Then the Delphi method was applied to collect the opinions from MG experts in China.Based on the consistency of expert opinions and previous evaluation of the items in source scales , the preliminary version of a new scale was developed .Results The item pool consists of 19 items from the above four scales .The enthusiasm coefficients of experts in two rounds of survey are 91.4%（32/35） and 96.9%（31/32）.The authority coefficients are 0.79 and 0.80.The Kendall′s coefficients of concordance of expert opinions are 0.22 （χ2 =127.01, P〈0.01） and 0.42 （χ2 =231.56, P〈0.01）, respectively.The preliminary version consists of 10 items, which cover six commonly involved muscle groups in MG, including the ocular, bulbar, facial, limb, axial and the respiratory muscles.Conclusion The preliminary version of the MG severity scale was established by combining Delphi method with the previous evaluation of items from source scales .