“Blacks experience significantly higher cancer incidence than do whites for all cancer sites combined, from about 10% higher, depending on the time period and geographic area. According to statistical reviews published by the National Cancer Institute, this disparity is becoming larger…”

“These findings suggest that the disproportionate distribution of blacks at lower socioeconomic levels accounts for much of the excess cancer burden among blacks. They also suggest that for both blacks and whites unidentified racial factors, which may be either cultural or genetic and which are not closely linked to socioeconomic status, may play a role in the incidence of some cancers.”