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To the Editor:—
In the letter of Drs. Kaplan and O'Conor on "The Incidence of Carcinoma of the Prostate in Jews and Gentiles" (196:803, 1966), the conclusion, which differs from mine, seems also to be based on different criteria. In making comparisons, it seems important to start out with similar premises, otherwise they are of doubtful value.These authors reported from Chicago for the period 1958 to 1964, where Jews constituted approximately 7% of the population and were fairly well-integrated socioeconomically and sexually with their non-Jewish neighbors. They found a cancer incidence of 23.9% in their 702 non-Jews and 8.8% in their 182 Jews.The figures of my private patients in Brooklyn for 1930 to 1941 (J Urol48:298, 1942) showed a prostatic cancer incidence of 20% in 75 non-Jews and 1.7% in 768 Jews. From 1942 to 1948 (NY J Med51:1519, 1951), it was 18%
Abraham Ravich. Circumcision and Cancer Of the Prostate. JAMA. 1966;197(8):666. doi:10.1001/jama.1966.03110080106044