Tables 3.

Total crude (N = 53,653) and adjusted breast cancer per capita costs, with and without breast MRI and stratified by the diagnostic and preoperative periods, among SEER-Medicare females (2005–2009)

		Total Costs			MRI		No MRI		MRI vs. No MRI
	Na	Nb	PCCc	Adjusted PCCb,c	PCCc	Adjusted PCCb,c	PCCc	Adjusted PCCb,c	Differenced
Total	53,653	43,414	$1,560	$1,541	$2,524	$2,382	$1,318	$1,317	$1,065
Imaging costs	53,653	43,414	$455	$467	$1,227	$1,200	$261	$272	$928
Biopsy costs	53,653	43,414	$1,105	$1,074	$1,297	$1,183	$1,057	$1,045	$138
Diagnostic period	53,653	43,414	$1,127	$1,107	$1,313	$1,253	$1,080	$1,069	$185
I maging costs	52,487	42,491	$288	$293	$442	$418	$250	$259	$159
Biopsy costs	53,653	43,414	$845	$821	$884	$845	$835	$814	$31
Preoperative period	20,570	16,775	$1,131	$1,127	$1,356	$1,316	$932	$947	$369
Imaging costs	14,834	12,358	$627	$508	$912	$907	$127	$128	$779
Biopsy costs	11,947	9,504	$1,169	$1,165	$1,282	$1,173	$1,122	$1,158	$15

^aUnadjusted N

^bModel Ns after excluding patients with missing patient or tumor characteristics

^cPCC: Per Capita Costs

^dDifference between the MRI groups from the adjusted models