Table 2 Among the female SEER-Medicare breast cancer cohort^a (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

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)

 BCS^c without Radiation

12,972

24 %

$1,362

(838–2,035)

$2,285

(1,782–2,955)

$1,198

(744–1,744)

 BCS^c 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)