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Table 2 Among the female SEER-Medicare breast cancer cohorta (2005–2009; N = 56,449), median and interquartile range (IQR) per capita costs for women within the diagnostic/preoperative window (N = 53,653) by tumor characteristics, with and without breast MRI

From: Costs of diagnostic and preoperative workup with and without breast MRI in older women with a breast cancer diagnosis

  Total Median Costs     MRI   No MRI  
(N = 53,653) (N = 10,776) (N = 42,877)
Characteristicsb of women N % Median IQR ($) Median IQR ($) Median IQR ($)
Total 53,653 100 % $1,353 (818–2,042) $2,251 (1,783–2,971) $1,152 (708–1,727)
Stage         
 0 8,533 16 % $1,721 (1,232–2,368) $2,627 (2,090–3,228) $1,524 (1,160–2,085)
 I 25,146 47 % $1,393 (878–2,080) $2,255 (1,799–2,985) $1,190 (781–1,751)
 II 14,328 27 % $1,106 (627–1,838) $2,093 (1,662–2,776) $891 (547–1,442)
 III 3,838 7 % $1,008 (535–1,76) $2,078 (1,631–2,775) $825 (452–1,345)
 IV 503 1 % $927 (449–1,685) $2,023 (1,690–2,791) $738 (405–1,294)
 Unknown 1,305 2 % $1,310 (815–1,938) $2,118 (1,620–2,743) $1,176 (741–1,712)
Histology (invasive)         
 Ductal 33,134 62 % $1,259 (751–1,953) $2,186 (1,742–2,892) $1,068 (664–1,641)
 Lobular 5,005 9 % $1,359 (765–2,061) $2,155 (1,736–2,837) $1,025 (615–1,576)
 Mixed 3,177 6 % $1,346 (795–2,094) $2,264 (1,774–2,968) $1,058 (656–1,580)
 Other 3,804 7 % $1,232 (714–1,877) $2,178 (1,623–2,927) $1,078 (648–1,674)
Grade         
 High 12,125 24 % $1,392 (877–2,083) $2,284 (1,811–3,050) $1,191 (772–1,754)
 Intermediate 22,522 45 % $1,351 (822–2,054) $2,238 (1,776–2,944) $1,129 (708–1,715)
 Low 15,133 30 % $1,289 (726–1,969) $2,212 (1,747–2,899) $1,100 (636–1,676)
Nodal Status         
 Positive 11,009 25 % $1,119 (623–1,851) $2,113 (1,652–2,842) $890 (534–1,439)
 Negative 32,952 75 % $1,379 (847–2,074) $2,242 (1,788–2,951) $1,158 (739–1,734)
ER Status         
 Positive 40,999 84 % $1,367 (827–2,061) $2,249 (1,787–2,971) $1,152 (716–1,732)
 Negative 7,978 16 % $1,263 (728–1,960) $2,231 (1,747–2,935) $634 (634–1,633)
Size         
 <1 cm 12,455 25 % $1,569 (1,090–2,253) $2,451 (1,967–3,184) $1,369 (987–1,936)
 1 to <2 cm 19,135 39 % $1,348 (824–2,031) $2,187 (1,745–2,925) $1,127 (723–1,716)
 2 to <5 cm 15,281 31 % $1,098 (610–1,826) $2,097 (1,660–2,798) $891 (532–1,459)
 5+ cm 2,620 5 % $1,057 (535–1,870) $2,133 (1,719–2,810) $840 (438–1,420)
Primary Treatment         
 Mastectomy 19,650 37 % $1,267 (696–1,955) $2,265 (1,746–3,028) $1,053 (602–1,686)
 BCSc without Radiation 12,972 24 % $1,362 (838–2,035) $2,285 (1,782–2,955) $1,198 (744–1,744)
 BCSc with Radiation 21,031 39 % $1,413 (909–2,126) $2,230 (1,801–2,925) $1,201 (602–1,762)
Number of days in Diagnostic/preoperative Window         
 <= Median (25 days) 27,779 52 % $1,172 (685–1,768) $2,009 (1,626–2,543) $1,056 (633–1,588)
 > Median (25 days) 25,874 48 % $1,593 (998–2,354) $2,392 (1,878–3,229) $1,272 (828–1,915)
  1. aEnrollment based on age, fee-for-service, and equal parts A and B
  2. bMissing (N): Grade (3,873), Nodal status (9,692), ER status (4,598), Size (4,162)
  3. cBCS: Breast Conserving Surgery