Incidence of cancer in United States blacks.

Incidence rates for the black population of six Standard Metropolitan Statistical Areas in the United States are examined using data collected in the Third National Cancer Survey, 1969 to 1971. For all sites combined, black males had the highest rates among the four major race-sex groups; black females had the lowest rates. For fourteen common sites accounting for 80% of the cancers among blacks, black/white ratios, survival data, trends between 1935 and 1969, and geographic variation are presented. United States black data adjusted to an African Standard are compared with similar data from Nigeria, Rhodesia, and South Africa.