The numbers of respondents included in the analyses are provided at the bottom of . and display standardized prevalences of ever and up-to-date CRC screening, respectively, by year for each ethnic group. Crude prevalences were generally similar to the standardized prevalences; the largest differences were for the Latino and Vietnamese populations, which tended to have prevalences adjusted upward 1–3% due to the standardization (data not shown).
Estimated age-and gender-standardized proportions of California residents ages 50 years and older who have ever received CRC screening *
Estimated age- and gender-standardized proportions of California residents ages 50 years and older who have received up-to-date CRC screening*
provides prevalences of ever receiving CRC screening. These trends are also illustrated in . Prevalences of ever screened by FOBT or endoscopy were higher among Whites and Blacks than among Latinos and Asians (all Asian ethnicities combined) over all three surveys. Among major ethnic groups, the greatest disparity in 2001 was a difference of 25% [95% CI: (22%, 29%)] between Latinos and Whites. Prevalences increased significantly from 2001 to 2005 in the state population overall and among Whites and Latinos. However, despite an 11% increase among Latinos, their rate was among the lowest for the major ethnic groups in 2005 and fell short of Whites by 18% [95% CI: (15%, 22%)]. Results for the Asian subgroups show even larger differences. Over all surveys, the Japanese had the highest prevalence while Koreans had the lowest prevalence (all p<.001). The difference in prevalence between these two groups increased from 22% [95% CI: (11%, 34%)] in 2001 to 44% [95% CI: (34%, 55%)] in 2005, attributable largely by a 16% decrease among Koreans from 2001 to 2005.
Estimated age- and gender-standardized proportions of California residents aged 50 or older who have ever received CRC screening
Between 2001 and 2005, prevalence of ever screened by endoscopy significantly increased in the state population overall and among Whites, Latinos, and Asians, as well as among Chinese, Filipino and Vietnamese. There was no significant increase among Blacks, Japanese or Koreans. Over all surveys, the highest prevalence of endoscopy was observed among Whites, followed by Blacks, Asians and Latinos. Prevalence of endoscopy was significantly higher among Japanese Americans than among Korean and Filipino Americans in all three surveys.
Among major ethnic groups, Latinos had the lowest prevalence of ever screened by FOBT in 2001. This group had a significant increase of 8% over the four-year period, and differences among these groups decreased from 2001 to 2005, with the largest difference in 2001, a difference of 30% [95% CI: (27%, 33%)] between Whites and Latinos, decreasing to 20% in 2005 [95% CI: (17%, 23%)]. This decreasing gap reflected a significant decrease among Whites combined with a significant increase among Latinos. Among the Asian subgroups, the Japanese had the highest prevalence while Koreans had the lowest across all surveys. The difference in prevalence between these two groups increased from 27% [95% CI: (15%, 38%)] in 2001 to 44% [95% CI: (35%, 52%)] in 2005, due largely to a 20% drop in prevalence of FOBT receipt among Koreans from 2001 to 2005.
Trends were similar for up-to-date screening (). Prevalence of up-to-date screening by FOBT or endoscopy increased in the population overall and among Whites and Latinos, and decreased among Korean Americans, who had low prevalence in all years and a 10% drop from 2001 to 2005. The gap between the highest and lowest up-to-date screening prevalence using any screening modality, exhibited by Japanese and Korean Americans, increased from 18% in 2001 to 30% in 2005. Prevalence of up-to-date endoscopy increased in most groups from 2001 to 2005, and prevalence of up-to-date FOBT showed declines or no increase. In 2005, lowest prevalences of being up-to-date with endoscopy were among Korean and Filipino Americans.