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The natural course of gonarthritis.

In order to learn how pathological changes and symptoms of gonarthritis progress over a long period of time, we selected those cases having a history for over 10 years, in which the patient had not received surgical operation, as the subjects of our investigation.The subject cases including 96 joints were investigated to find out the correlations between the progress of pathological change and such factors as sex, age, obesity, occupation, way of living, type of toilet, hospital visit, or FTA (femoro-tibial angle) etc. The results were as follows:(1) Changes at the medial condyle get most easily aggravated, which are followed by those occurred at the patellofemoral joint and the aggravation is the least in changes at the lateral condyle.(2) Obesity as opposed to normal makes the grade of gonarthritis worse.(3) There are no correlations between aggravation of gonarthritis and age, sex, way of living or occupation.(4) In advanced cases, patients use western style toilets.(5) In advanced cases, patients visit hospital more frequently.