The study here reported was made at St. Paul's School,1 and is recorded because data concerning the health of schoolchildren are always helpful. In Table 1 are summarized the diagnoses in the various cases, as given in the infirmary records, and the total number of days spent in the infirmary for three consecutive years.
There are several interesting points in this table that should be noted. In the first place it is quite evident that some of the conditions listed are closely related, and a sharp differential diagnosis is often impossible. This is particularly true of the first nine conditions, the respiratory tract infections. The diagnosis was made either from the outstanding condition on admission, or from the development of the disease during the illness. That is to say, if a boy came to the infirmary with coryza, but later developed bronchitis, the diagnosis was given as bronchitis; or