Table 1.
Characteristics of 222 088 older women who underwent screening mammography between 1999 and 2010 in the Breast Cancer Surveillance Consortium by Charlson Comorbidity Index
| Characteristics | Overall, No. (%)* | Charlson Comorbidity Index, No. (%)* |
||
|---|---|---|---|---|
| 0 | 1 | ≥2 | ||
| Total number of women | 222 088 | 164 576 (74.1)† | 42 234 (19.0)† | 15 278 (6.9)† |
| Age group, y | ||||
| 66–74 | 154 784 (69.7) | 117 299 (75.8) | 28 143 (18.2) | 9342 (6.0) |
| 75–84 | 57 859 (26.1) | 40 824 (70.6) | 12 109 (20.9) | 4926 (8.5) |
| 85–94 | 9445 (4.3) | 6453 (68.3) | 1982 (21.0) | 1010 (10.7) |
| Race/ethnicity | ||||
| White, non-Hispanic | 171 189 (84.8) | 130 428 (76.2) | 30 391 (17.8) | 10 370 (6.1) |
| Black, non-Hispanic | 16 218 (8.0) | 9498 (58.6) | 4631 (28.6) | 2089 (12.9) |
| Hispanic | 3754 (1.9) | 2672 (71.2) | 794 (21.2) | 288 (7.7) |
| Asian/Pacific Islander | 7965 (3.9) | 5705 (71.6) | 1739 (21.8) | 521 (6.5) |
| Other | 2645 (1.3) | 1809 (68.4) | 580 (21.9) | 256 (9.7) |
| Missing | 20 317 (9.1) | 14 464 (71.2) | 4099 (20.2) | 1754 (8.6) |
| Education | ||||
| <High school graduate | 30 337 (16.9) | 19 256 (63.5) | 7877 (26.0) | 3204 (10.6) |
| High school graduate or GED | 60813 (33.8) | 44 558 (73.3) | 12 138 (20.0) | 4117 (6.8) |
| Some college or technical school | 44 143 (24.5) | 34 143 (77.3) | 7509 (17.0) | 2491 (5.6) |
| College graduate | 44 530 (24.8) | 36 501 (82.0) | 6122 (13.7) | 1907 (4.3) |
| Missing | 42 265 (19.0) | 30 118 (71.3) | 8 588 (20.3) | 3559 (8.4) |
| Time since prior mammogram | ||||
| No prior mammogram | 6300 (3.1) | 4244 (67.4) | 1406 (22.3) | 650 (10.3) |
| <2 years | 169 787 (82.4) | 128 650 (75.8) | 31 016 (18.3) | 10 121 (6.0) |
| ≥2 years | 30 111 (14.6) | 20 616 (68.5) | 6454 (21.4) | 3041 (10.1) |
| Missing | 15 890 (7.2) | 11 066 (69.6) | 3358 (21.1) | 1466 (9.2) |
| BI-RADs breast density | ||||
| Almost entirely fat | 22 008 (11.1) | 15 312 (69.6) | 4860 (22.1) | 1836 (8.3) |
| Scattered fibroglandular densities | 107 890 (54.6) | 78 660 (72.9) | 21 477 (19.9) | 7753 (7.2) |
| Heterogeneously dense | 61 370 (31.1) | 47 013 (76.6) | 10 591 (17.3) | 3 766 (6.1) |
| Extremely dense | 6284 (3.2) | 4993 (79.5) | 959 (15.3) | 332 (5.3) |
| Missing | 24 536 (11.0) | 18 598 (75.8) | 4347 (17.7) | 1591 (6.5) |
| First-degree family history of breast cancer | ||||
| No | 145 928 (82.5) | 108 147 (74.1) | 27 654 (19.0) | 10 127 (6.9) |
| Yes | 30 990 (17.5) | 23 055 (74.4) | 5697 (18.4) | 2238 (7.2) |
| Missing | 45 170 (20.3) | 33 374 (73.9) | 8 883 (19.7) | 2913 (6.4) |
| Mode of detection‡ | ||||
| Screen detected | 6049 (75.0) | 4626 (76.5) | 1047 (17.3) | 376 (6.2) |
| Non-screen detected | 2014 (25.0) | 1468 (72.9) | 405 (20.1) | 141 (7.0) |
| Missing | 1262 (13.5) | 966 (76.5) | 235 (18.6) | 61 (4.8) |
*
Percentages are based on the row unless otherwise indicated. BI-RADS = Breast Imaging Reporting and Data System.
†
Percentages are based on the column.
‡
Based on women with a diagnosis of invasive breast cancer or ductal carcinoma in situ during follow-up.