Abstract
Stomach cancer mortality rates for Puerto Rican migrants to New York City were lower than those for Puerto Ricans in Puerto Rico and higher than for other whites in New York City for the time periods 1958–1962, 1963–1967 and 1968–1971. It is estimated that they were midway between the rates for native-born whites in New York and those for nonmigrant Puerto Ricans. Colon cancer mortality rates for Puerto Rican migrants to New York were about the same as those in Puerto Rico in the 1960 period; in 1965, male rates for migrants rose nearly 90 per cent and remained at that rate in 1970. Female migrant rates rose slightly from 1960 to 1970, while in Puerto Rico rates for colon cancer for both sexes remained about the same. Colon cancer rates for other whites in New York were in all three time periods two to three times higher than those for Puerto Rican migrants. The greater relative change in stomach cancer mortality compared to colon cancer for Puerto Rican migrants is different from the change reported for migrants to the United States from European or Oriental countries. The Puerto Rican data suggest that stomach cancer rather than colon cancer is more responsive to recent environmental exposure. The recency of migration of Puerto Ricans and the small numbers of deaths from these cancers may, however, account for these contradictory findings.
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