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The following statistical tables represent the records of 5,700 cases of diseases of the ear treated during the last eight years at the Illinois Charitable Eye and Ear Infirmary, in Chicago. I have added a relatively small number of unselected cases from the records of my private practice to supply the place of those whose records were incomplete. The purpose for which the classification was begun was to establish a basis of calculation of the influence, if any, exerted by occupation, age or sex in the causation of ear-diseases. The condition of each patient at the time he first presented himself at the clinic was recorded in order to determine the relative frequency of the different diseases.
As is usual in charity hospitals, a very large percentage of those who applied for treatment belonged to that class of laboring people who have no definite trade or fixed occupation. It is
BISHOP SS. STATISTICAL REPORT OF 5700 CASES OF EAR-DISEASES, CLASSIFIED BY AGE, SEX, OCCUPATION AND DISEASE: CAUSATION. Read in the Section on Otology of the Ninth International Medical Congress. JAMA. 1887;IX(25):771–773. doi:10.1001/jama.1887.02400240003001a
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