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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