The indices of average duration of one case of morbidity associated with temporary disability taking into account their informative capacity can, to a considerable degree, be regarded as a quality criterion of the curative and diagnostic process. However, despite the relative simplicity, the determination of the validity degree of difference between the indices of the average duration of disability is rather a labour-consuming task. An assessment table is proposed which permits to determine the validity degree of difference between dimensions compared. Algorithms of table design and the examples of its use are provided.