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Table 1 Sample characteristics of BCSC mammograms by woman, facility, and census-level characteristics

From: Is the closest facility the one actually used? An assessment of travel time estimation based on mammography facilities

 

Geographic level of variable

N

%

N missing

Total population

 

646,553

  

Woman-level characteristics

    

Age

Woman level

  

0

 30–40

 

35,483

5.5

 

 40–49

 

194,760

30.1

 

 50–59

 

181,832

28.1

 

 60–69

 

126,106

19.5

 

 70–79

 

75,192

11.6

 

 80+

 

33,180

5.1

 

Race/ethnicity

Woman level

  

119,624

 White, non-Hispanic

 

372,016

70.6

 

 Black, non-Hispanic

 

38,949

7.4

 

 Hispanic

 

27,315

5.2

 

 Asian

 

75,278

14.3

 

 Native American

 

3040

0.6

 

 Other

 

10,331

2

 

Education

Woman level

  

242,322

 Less than high school

 

37,773

9.3

 

 High school

 

83,888

20.8

 

 Some college

 

100,696

24.9

 

 College or post-college graduate

 

181,874

45

 

Census-levelb characteristics

    

Rurality

Censusb: 2006 zip code

  

238

 Urban core

 

452,224

70

 

 Suburban areas

 

41,888

6.5

 

 Large town areas

 

93,165

14.4

 

 Small town and isolated rural

 

59,038

9.1

 

Median household income

Censusb: Block group

  

503

 <45K

 

144,480

22.4

 

 45–59,999K

 

139,912

21.7

 

 60–84,999K

 

198,303

30.7

 

 85K+

 

163,355

25.3

 

Diversity index

Censusb: Tract

  

503

 0–25

 

148,217

22.9

 

 26–50

 

158,971

24.6

 

 51–75

 

243,632

37.7

 

 76–100

 

95,230

14.7

 

Average spent on public transportation

Censusb: Block group

 

503

 

 <100$

 

364,469

56.4

 

 >100$

 

281,581

43.6

 

Median travel time to work

Censusb: Block group

  

3

 <15 min

 

51,038

7.9

 

 15–30 min

 

473,988

73.3

 

 >30 min

 

121,524

18.8

 

Actual facilitya characteristics

    

Academic status

Facility levela

  

172,334

 Academic

 

65,966

13.9

 

 Non-academic

 

408,253

86.1

 

Practice type

Facility levela

  

172,334

 Multispecialty

 

126,331

26.6

 

 General radiology

 

330,449

69.7

 

 Breast imaging only

 

13,370

2.8

 

 Non-radiology

 

4069

0.9

 
  1. aFacility where the exam took place
  2. bCensus-level variable for woman’s place of residence