Structured organization of clinical data bases
AFIPS '75 Proceedings of the May 19-22, 1975, national computer conference and exposition
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This paper details the principles and implementation of a time-oriented clinical database and a program for displaying data on individual patients as graphs, line drawings of episodes and scatter diagrams. The article presents efficient data structures for storage of graphs in which plots of multiple variables are overlayed. The display program permits plotting of patient data either by visit or by time, telescoping of the time axis, and changing of the display size. Line drawings of concurrent clinical episodes may be aligned beneath the graphs. No special graphics equipment is required. Issues of data representation, transformation, and display layout are discussed.