Table 2. Unadjusted Relative Risks of Digital Breast Tomosynthesis Screening On-site Access by Sociodemographic Characteristics.
| Characteristic by examination year | On-site DBT access, RR (95% CI) | ||
|---|---|---|---|
| Race/ethnicitya | Black | Hispanic | Asian American |
| 2011 | 0.06 (0.04-0.11) | 0.64 (0.42-0.97) | 0.47 (0.25-0.92) |
| 2012 | 0.05 (0.03-0.11) | 0.38 (0.18-0.80) | 0.28 (0.11-0.75) |
| 2013 | 0.27 (0.09-0.82) | 0.42 (0.22-0.81) | 0.23 (0.09-0.57) |
| 2014 | 0.42 (0.18-1.00) | 0.42 (0.22-0.81) | 0.21 (0.09-0.47) |
| 2015 | 0.84 (0.57-1.23) | 0.77 (0.57-1.04) | 0.54 (0.27-1.07) |
| 2016 | 1.28 (1.05-1.56) | 0.98 (0.77-1.25) | 0.57 (0.30-1.05) |
| 2017 | 1.16 (1.02-1.32) | 1.10 (0.98-1.24) | 0.63 (0.34-1.17) |
| Educational levelb | Less than high school | High school diploma | Some college |
| 2011 | 0.24 (0.14-0.40) | 0.22 (0.15-0.31) | 0.76 (0.62-0.93) |
| 2012 | 0.18 (0.10-0.32) | 0.62 (0.42-0.91) | 0.71 (0.57-0.89) |
| 2013 | 0.26 (0.13-0.53) | 0.82 (0.50-1.36) | 0.90 (0.65-1.23) |
| 2014 | 0.38 (0.19-0.74) | 1.10 (0.69-1.75) | 1.06 (0.78-1.42) |
| 2015 | 0.66 (0.38-1.14) | 1.02 (0.71-1.48) | 0.95 (0.78-1.17) |
| 2016 | 0.94 (0.44-1.99) | 1.26 (0.94-1.70) | 1.12 (0.96-1.32) |
| 2017 | 0.72 (0.33-1.54) | 0.96 (0.76-1.21) | 1.00 (0.89-1.13) |
| Geocoded incomec | BCSC quartile 1 | BCSC quartile 2 | BCSC quartile 3 |
| 2011 | 0.08 (0.04-0.14) | 1.10 (0.64-1.88) | 0.63 (0.46-0.86) |
| 2012 | 0.40 (0.11-1.51) | 1.40 (0.71-2.76) | 1.16 (0.48-2.80) |
| 2013 | 0.79 (0.25-2.54) | 1.76 (0.88-3.52) | 1.21 (0.61-2.39) |
| 2014 | 1.19 (0.48-2.97) | 2.05 (1.06-3.96) | 1.46 (0.83-2.56) |
| 2015 | 1.06 (0.61-1.82) | 1.46 (0.93-2.30) | 1.16 (0.84-1.59) |
| 2016 | 1.35 (0.95-1.91) | 1.38 (1.01-1.89) | 1.08 (0.85-1.39) |
| 2017 | 1.08 (0.91-1.28) | 1.08 (0.92-1.26) | 1.00 (0.89-1.13) |
| Geocoded residenced | Large rural | Small rural | Isolated rural |
| 2012 | 1.07 (0.15-7.64) | 0.70 (0.17-2.87) | 1.49 (0.30-7.47) |
| 2013 | 1.00 (0.25-4.07) | 0.56 (0.18-1.77) | 1.16 (0.33-4.07) |
| 2014 | 1.09 (0.45-2.63) | 1.04 (0.45-2.42) | 1.20 (0.53-2.73) |
| 2015 | 0.99 (0.48-2.02) | 1.05 (0.53-2.11) | 1.24 (0.74-2.08) |
| 2016 | 1.06 (0.73-1.52) | 0.86 (0.45-1.67) | 1.06 (0.69-1.63) |
| 2017 | 1.02 (0.80-1.29) | 0.69 (0.36-1.34) | 0.90 (0.63-1.31) |
Abbreviations: BCSC, Breast Cancer Surveillance Consortium; DBT, digital breast tomosynthesis; RR, relative risk.
a
Reference group consists of White women.
b
Reference group consists of college degree.
c
Reference group consists of BCSC quartile 4. Calculated as income quartiles observed in BCSC study population. For DBT access, quartile 1 indicates less than $60 781; quartile 2, $60 781 to $77 663; quartile 3, $77 664 to $99 953; and quartile 4, greater than $99 953.
d
Reference group consists of urban residence. Geocoded residence is not portrayed for 2011 because all DBT examinations that year were from a single regional registry.