[An analysis of the efficiency-stage in pupils suffering from chronic nonspecific lung diseases (CNSLD) (author's transl)].

Investigations were performed into school-certificates of 70 school-children suffering from CNSLD (controllgroup: 360 healthy children). Although the quantity of the days of the absence from school in the CNSLD-group is more than six times higher--most differences between the two groups were not significant, or the results of the sick children were even rather better than those of healthy ones. The eventual causes of this phenomenon are discussed (a good attitude in learning? a systematic promotion of this children at school and in the family? etc.).