An evaluation was made of the reliability and validity of the information obtained by the first examination completed under the ABSMTL. Results of the analysis show clearly that the materials hardly can be utilized for studying the relationship between findings obtained from the medical examination and distance from the hypocenter. From the standpoint of clinical medicine, the lack of exactness in the examinations may be a major difficulty. However, as long as the degree of inexactness of the medical examinations is distributed equally to all sample members, comparison of the findings may be made within the limits of their accuracy. 4 references, 1 figure, 3 tables.