Table 2 Descriptive statistics by county: endoscopy sample (male and female, 2001-2005)

Percent of the FFS Medicare sample who used colonoscopy or sigmoidoscopy screening in 2001-2005

36.92

6.17

14.90

66.67

Percent of the FFS Medicare sample aged 75-84

33.23

3.42

12.77

48.08

Percent of the FFS Medicare sample aged 85+

6.70

1.68

0.00

14.77

Percent of the FFS Medicare sample either with ESRD/disabled or having dual eligibility

20.03

10.51

0.00

84.21

Percent of the FFS Medicare sample who are white

91.5

12.5

3.6

100

Percent of the FFS Medicare sample who are Black

5.98

10.81

0.00

74.95

Percent of the FFS Medicare sample who are Hispanic

0.92

3.46

0.00

43.54

Percent of the FFS Medicare sample who are other races, non-white

1.57

6.50

0.00

96.36

Percent of the FFS Medicare sample who moved in 2001-2005

9.30

6.23

0.00

98.64

Averaged distance from FFS Medicare sample member residential ZIP codes to endoscopy providers in 2001-2005 (miles)

10.2

18.1

0.07

473.64

Percent of county level penetration by all managed care plans in 2001

10.00

12.47

0.00

89.50

Population density (per square mile)

0.24

1.66

0.00

67.11

Percent of the county population in poverty in 2003

13.73

5.77

0.00

43.50