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Table 2 Effects of the interaction of ethnicity, neighborhood poverty and health insurance on chemotherapy receipt in California, 1996-2000

From: Lack of access to chemotherapy for colon cancer: multiplicative disadvantage of being extremely poor, inadequately insured and African American

      NHWA-AA
  No.1 Rate RR2 (95% CI) Chemotherapy RD
< 30% Poor & Adequately Insured
  Non-Hispanic white American 2,249 .395 1.00   
  African American 94 .377 0.95 (0.75, 1.20) 1.8%
Intermediate Groups3
  Non-Hispanic white American 673 .345 1.00   
  African American 314 .277 0.80 (0.65, 0.98) 6.8%
≥ 30% Poor & Inadequately Insured
  Non-Hispanic white American 79 .352 1.00   
  African American 51 .146 0.41 (0.22, 0.78) 20.6%
  1. Notes. NHWA, Non-Hispanic white American; AA, African American; RR, Standardized rate ratio; RD, Standardized rate difference; CI, Confidence interval. All rates were directly age and stage-adjusted using this study’s combined AA-NHWA population of cases as the standard.
  2. 1Number of incident colon cancer cases.
  3. 2A rate ratio of 1.00 was the within-ethnic group baseline.
  4. 3Included those who lived in extremely poor neighborhoods, but were adequately insured or those who lived in less poor neighborhoods, but were inadequately insured.