The following statistic table of 15,300 cases, combined with a table of 5,700 cases already published, represent the records of 21,000 treated during the past seventen years at the Illinois Charitable Eye and Ear Infirmary in Chicago. The following table was compiled for me by my assistant, Dr. Charles L. Enslee.
My first classification was instituted for the purpose of establishing a basis of calculation of the influence, if any, exerted by occupation, age or sex in the causation of diseases of the ear, nose and throat.
The condition of each patient at the time he first presented himself at the clinic is presented to determine the relative frequency of the different diseases.
As is common in charity hospitals, a considerable number of those who applied for treatment belonged to that class of laboring people who have no definite trade or fixed occupation. In order to facilitate investigation and simplify