Using the algorhythm of a successional statistical Wald procedure, the author elaborated a table for the assessment of the probability of a transition of an exacerbation into remission on the 20th day. The table was tested in the studied group (87 patients) and in control series (94 patients). In a 5% level of permissible error, with the aid of the table a correct prognostical evaluation was attained in 70.5% of the conclusions, incorrect ones in 7.9% and indefinite in 21.0%. Incorrect and indefinite responses prevailed in cases of sclerotomic and radicle lumbo ischalgia. The table is intended for selection of a more severe group, the treatment of which from the beginning of an exacerbation is expedient to conduct in a neurological ward.