Difford F
Br Med J (Clin Res Ed). 1985 Oct 12;291(6501):1017-20. doi: 10.1136/bmj.291.6501.1017.
A method of dividing a map of the practice area into a grid based on postcode locations is described. The distribution of the practice population may thus be shown graphically and trends observed. The geographical incidence and prevalence of morbidity may also be charted and variations of statistical significance determined. This is a practical tool that will have greater potential as information technology in general practice develops.
描述了一种基于邮政编码位置将实践区域地图划分为网格的方法。由此可以以图形方式显示实践人群的分布并观察到趋势。还可以绘制发病率和患病率的地理分布情况，并确定具有统计学意义的差异。随着全科医疗中信息技术的发展，这是一种具有更大潜力的实用工具。
