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. Author manuscript; available in PMC: 2011 Jun 15.
Published in final edited form as: Cancer. 2010 Jun 15;116(12):2922–2931. doi: 10.1002/cncr.25093

Table 2.

Characteristics of Area of Residence

NHIS SEER-Medicare
White African-
American		 Hispanic P-
value		 White African-
American		 Hispanic P-
value
Mean # of primary care physicians per 100K people ≥ 50 years (county) 205.8 214.4 221.2 <.0001 224.6 235.9 242.0 .0537
Mean # of colonoscopies & sigmoidoscopies per 100K people ≥ 50 years (county) 1627.9 1568.8 1224.2 <.0001 1412.3 1417.8 1053.5 <.0001
Mean % African-American1 10.1% 28.5% 11.7% <.0001 6.0% 54.8% 6.0% <.0001
Mean % Hispanic1 4.2% 5.4% 19.9% <.0001 11.4% 15.0% 44.6% <.0001
Mean household income1 $ 43,081 $ 40,914 $ 41,330 <.0001 $52,049 $34,826 $43,686 <.0001
1

These measures are calculated at the level of the county for NHIS and at the level of the census tract for SEER-Medicare.