Table I.
Characteristics of study sample by type of operation
| UM |
CPM |
P value | |||
|---|---|---|---|---|---|
| N | % | N | % | ||
| Sample size | 11,575 | 1,384 | |||
| Age (y) at time of operation | <.001 | ||||
| Age <40 | 632 | 5.5 | 291 | 21.0 | |
| Age 40–54 | 2,221 | 19.2 | 523 | 37.8 | |
| Age 55–64 | 2,785 | 24.1 | 390 | 28.2 | |
| Age 65–74 | 2,690 | 23.2 | 150 | 10.8 | |
| Age 75+ | 3,247 | 28.1 | 30 | 2.2 | |
| Race | <.001 | ||||
| White | 7,801 | 67.4 | 1,242 | 89.7 | |
| Black | 1,954 | 16.9 | 61 | 4.4 | |
| Other | 1,820 | 15.7 | 81 | 5.9 | |
| Ethnicity | <.001 | ||||
| Hispanic | 1,019 | 8.8 | 50 | 3.6 | |
| Not Hispanic | 10,083 | 87.1 | 1,311 | 94.7 | |
| Unknown | 473 | 4.1 | 23 | 1.7 | |
| Year of operation | <.001 | ||||
| 2008 | 3,832 | 33.1 | 347 | 25.1 | |
| 2009 | 4,027 | 34.8 | 492 | 35.5 | |
| 2010 | 3,716 | 32.1 | 545 | 39.4 | |
| Insurance | <.001 | ||||
| Private insurance | 5,363 | 46.3 | 1,219 | 88.1 | |
| Medicare | 3,588 | 31.0 | 99 | 7.2 | |
| Medicaid | 2,297 | 19.8 | 54 | 3.9 | |
| Other | 327 | 2.8 | 12 | 0.9 | |
| Breast reconstruction | <.001 | ||||
| No | 6,223 | 53.8 | 95 | 6.9 | |
| Yes | 5,352 | 46.2 | 1,289 | 93.1 | |
| Timing of reconstruction* | <.001 | ||||
| Immediate (at time of operation) | 4,920 | 91.9 | 1,269 | 98.4 | |
| Delayed | 432 | 8.1 | 20 | 1.6 | |
| Breast reconstruction type* | <.001 | ||||
| Not implant based | 1,275 | 23.8 | 182 | 14.1 | |
| Implant based | 4,077 | 76.2 | 1,107 | 85.9 | |
UM, unilateral mastectomy; CPM, contralateral prophylactic mastectomy.
*
For those who received reconstruction. Women who had an implant as any component of breast reconstruction (with or without additional autologous tissue) were categorized as having implant-based reconstruction.