Table 5.

Multivariable-adjusted Relationship between Medicare Carrier and Payment for DXAs repeated < 23 months since prior DXA

Factor or Medicare Carrier	Odds Ratio (95% CI)
Demographics
Age	1.01 (1.00 – 1.03)
Women	0.98 (0.80 – 1.20)
Repeated at < 12 months (vs. 12 – 23 months)	0.46 (0.39 – 0.55)
Characteristics of Facility in which DXA was performed
Urban location (vs. rural)	0.94 (0.81 – 1.08)
Performed in physician office (vs. a facility)	0.12 (0.10 – 0.14)
Medicare Carrier (referent to Noridian)
Wisconsin (WI, IL, MI)	0.03 (0.02 – 0.04)
Cahaba GBA (AL, GA, MS)	0.04 (0.03 – 0.06)
Physician Service (MN)	0.05 (0.03 – 0.08)
First Coast Service (FL, CT)	0.08 (0.06 – 0.12)
Cigna (NC, TN, ID)	0.08 (0.05 – 0.12)
BC/BS of RI (RI)	0.09 (0.04 – 0.19)
Palmetto (OH, WV, SC)	0.06 (0.04 – 0.09)
NHIC (CA, ME, NH, MA, VT)	0.16 (0.11 – 0.23)
Trailblazer (TX, VA, MD, DE, DC)	0.18 (0.13 – 0.26)
New York*	0.25 (0.16 – 0.38)
Adminastar (IN, KY)	0.55 (0.32 – 0.95)
BC/BS of Ark. (NM, OK, AR, LA, MO)	0.69 (0.43 – 1.10)
BC/BS of Utah (UT)	0.82 (0.24 – 2.80)
Empire (NJ)	1.10 (0.59 – 2.05)
HGSA Admin (PA)	0.67 (0.34 – 1.32)
BC/BS of Kansas (KS, NE)	2.06 (0.80 – 5.33)

The c statistic for this model was 0.82.

CI = Confidence Interval

^*New York is served by more than 1 local Medicare carrier