In the evaluation of any experiment of the type just described, the results will fall into three categories: Some will be unqualified successes; others will be rank failures, and still another group will be somewhere between in an inconclusive category. They may fall in this last group for a variety of reasons, such as insufficient observation, controversial findings or results which cannot be readily interpreted. When one is evaluating a problem involving as it does the public health aspects of an infectious disease, with the consequent dangers of exposing others to the infection, one must be overcritical in dealing with this inconclusive group of results, since they represent the real pitfalls of the experiment. Accordingly, with this in mind, I have tended to regard all patients who lapsed from observation while still seropositive as failures. I fully realize that a certain number of these will eventually be cured, but since
WEBSTER B. FOLLOW-UP OBSERVATIONS AT NEW YORK HOSPITAL. Arch Derm Syphilol. 1940;42(2):264–266. doi:10.1001/archderm.1940.01490140028006
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