Among the variables1 which determine the character and outcome of pneumonia, one of the most important is the presence of concomitant conditions. In this paper are published the results of a study of the records of 1,469 patients, in 742 of whom some associated or concomitant condition was recognized.
MATERIAL AND METHODS
A concomitant condition is considered as any condition, barring pneumonia and its sequelae, the presence of which was indicated by any part of the patient's record. (If the records had been ideally complete, there would have been few if any patients without such conditions.) The original clinical, laboratory and nursing records of all (1,469) patients with pneumococcic pneumonia from 1934 through 1938 were abstracted in their entirety by some of the group of workers. One of us checked the abstracts with the original records, prepared the data for tabulation and supervised the analysis. Further details are given
MOORE FJ, RAULSTON BO, THOMAS RE, MAGUIRE JF, RIDGE GK. PNEUMOCOCCIC PNEUMONIA: ANALYSIS OF THE RECORDS OF 1,469 PATIENTS TREATED IN THE LOS ANGELES COUNTY HOSPITAL FROM 1934 THROUGH 1938 II. OUTCOME AND CHARACTER OF PNEUMONIA IN THE PRESENCE OF ASSOCIATED OR CONCOMITANT CONDITIONS. Arch Intern Med (Chic). 1940;66(6):1317–1330. doi:10.1001/archinte.1940.00190180129009
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