shows age-adjusted incidence rates for the 6 cancers with higher overall incidence rates in blacks, Hispanics, Asians, or AI/AN than in non-Hispanic whites in the 17 SEER areas in total and, except for AI/AN, in the individual SEER areas. Individual areas are ordered by population size from largest to smallest. For several registries, particularly the smaller ones, statistics are based on <16 cases or cannot be calculated. Among blacks, the overall pattern of higher incidence compared to non-Hispanic whites is consistent for most of the cancers, with some exceptions, particularly in the smaller registries and for lung cancer and kidney/renal pelvis cancer. Among Hispanics and Asians, incidence of stomach cancer is higher than in non-Hispanic whites in all registries with adequate statistics.
shows the average annual number of patients with the 6 cancers for which the age-adjusted incidence is higher in blacks in each of the 10 registries with black population ≥100,000. Those places where the number of cases is 100–149 or <100 are highlighted. For non-Hispanic whites, there are >150 cases of all cancers studied in these 10 registries, with the exception of pancreatic and stomach cancers in Atlanta. Among blacks, for the more common cancers (prostate, lung/bronchus, colorectal), there are >150 cases in most of the registries studied, with the exception of Seattle, and, for colorectal cancer, Connecticut. For the less common cancers (kidney/renal pelvis, pancreas, and stomach), there are <150 black cases in each of the 10 registries, with the exception of kidney/renal pelvis and pancreas cancers in Louisiana. In 7 of the 10 registries, there are <100 cases per year for some or all of these less common cancers. shows the number of non-Hispanic whites, Hispanics, and Asians with stomach cancer in each registry studied. Only Greater California and Los Angeles have ≥150 Hispanics with stomach cancer and only the 3 California registries have ≥150 Asians with stomach cancer per year. For AI/AN, the total number of cases in SEER registries with these cancers is: prostate, 772; lung, 1,013; colorectal, 924; kidney, 409; pancreas, 216; stomach, 239 (not shown in tables).
Average Annual Number of Incident Cases of Selected Cancers for Blacks and Non-Hispanic Whites in Individual SEER Areas with Black Population ≥ 100,000 (2002–2006)
Average Number of Incident Cases of Stomach Cancer by Race/ Ethnicity in Individual SEER Areas with ≥ 100,000 Hispanics or Asians (2002–2006)
contains data on the median age at diagnosis across the racial/ethnic groups studied. Among non-Hispanic whites the median age at diagnosis ranges from 66 (for kidney/ renal pelvis cancer) to 73 (for pancreas and stomach cancers), while blacks are diagnosed at younger ages (range 61–68) for each of these cancers. For stomach cancer, Hispanics are diagnosed at a median age of 66, while Asians are diagnosed at a median age of 70. AI/AN are diagnosed with stomach and kidney cancer at younger ages than the other groups, 64 and 60, respectively.
Median Age at Diagnosis for Selected Cancers by Race-Ethnicity (2002–2006)
For the combined SEER registries, excluding Alaska, shows the number of people in each of the racial /ethnic groups in 5-year age categories from 20–24 through >85 years. It can be seen that the number of individuals is generally smaller in each successive age group, particularly at ages >50. The increase in non-Hispanic whites between the ages of 25 and 49 reflects births in the US from the late 1940s to the 1970s7
, the period of the post-World War II baby boom. shows the percentage of each racial/ethnic group in the 20–24 through >85 age categories in the SEER areas. Comparing across age groups, there is a clear increase in the proportion of the population that is non-Hispanic white, while Hispanics show a decline. Blacks and Asians have similar proportions in the population and similar changes in relation to age group; the proportion who are AI/AN is small overall. To quantify the changes between age groups, we calculated the ratio of the proportion in the oldest age group to that in the youngest age group for each racial/ethnic group (). For non-Hispanic whites, the proportion in the oldest age group is considerably higher than in the youngest group, with a ratio of 1.59. For the other groups, the ratio is below 1: 0.67 for Asians, 0.46 for blacks, 0.26 for Hispanics and 0.25 for AI/AN. Examples of different population structures among registries are also illustrated in . For example, for blacks in Louisiana and Atlanta, the ratios are somewhat higher (0.62 and 0.53) than in New Jersey (0.37). For Hispanics, the ratio is slightly higher in Los Angeles than in Greater California and the Greater Bay Area. For Asians, the results from Los Angeles show relatively little change across age groups (ratio=0.86), while in Hawaii there is a higher proportion of Asians in the oldest group than in the youngest, with a ratio of 1.33 (data not shown in table).
Number of Individuals in SEER Areas According to Age Group (2004)
Proportion of Individuals in SEER Areas According to Age Group (2004)
Proportion of each racial/ethnic group, overall and in selected registries, in the youngest (20–24) and oldest (≥85) age groups