Négrel A D, Thylefors B
Organisation Mondiale de la Santé, Genève, Suisse.
Rev Int Trach Pathol Ocul Trop Subtrop Sante Publique. 1992;69:97-105.
In 1987, World Health Organization (W.H.O.) program for the Blindness Prevention proposed a simple system for coding and recording the various stages of Trachoma and its complications. Since this time, this system revealed to be a convenient and useful tool and was used in each epidemiological survey carried out together with Member States, either for blindness prevalence and causes studies as in Benin, Congo, Togo and Turkey, or for specific studies on Trachoma as in Vietnam, Morocco, Mali and in Kiribati. After a short presentation of the most significative results of these studies, the authors discuss on: 1--Details of practical use for this system in the field conditions, underlining particularly: training for future users; setting up of a study concerning reliability: this study has to be both easy an serious to allow an acceptable similarity between the observations of several examiners; some important points to calculate the size of the sample which has to be studied. 2--Main parameters and epidemiological signs which can be took on and invigilated thanks to this system.
1987年，世界卫生组织（W.H.O.）的防盲计划提出了一个用于编码和记录沙眼及其并发症各个阶段的简单系统。自那时以来，该系统被证明是一种方便且有用的工具，并在与成员国共同开展的每次流行病学调查中使用，既用于如在贝宁、刚果、多哥和土耳其进行的盲症患病率及病因研究，也用于如在越南、摩洛哥、马里和基里巴斯进行的沙眼专项研究。在简要介绍这些研究的最显著结果后，作者讨论了：1--该系统在实地条件下的实际使用细节，特别强调：对未来使用者的培训；开展一项关于可靠性的研究：这项研究必须既简便又严谨，以使几位检查人员的观察结果之间具有可接受的相似度；计算待研究样本规模的一些要点。2--借助该系统可获取和监测的主要参数及流行病学体征。
