Table 2.

Multivariate linear regression models predicting cumulative Medicare expenditure and cumulative lifetime at 42 months of 4,324 HD Patients with CABG surgery

Risk Factor at baseline	Medicare expenditure ($)			Lifetime (d)
	estimate	95% CI		estimate	95% CI
Age ≥ 65 yr	−22,454	−32,978	−12,775	−98	−144	−51
Male gender	−15,498	−25,345	−6,636	−53	−107	−5
Race (reference = white)
Asian	22,908	−14,968	55,130	116	3	214
black	18,683	4,394	32,119	34	−38	100
Native American	3,844	−24,745	34,533	89	−45	201
Other	40,574	−41,705	65,778	264	−582	491
Medicaid coveragea	21,564	6,100	35,780	28	−49	100
No. of cardiovascular conditionsa	−1,406	−4,274	1,052	−26	−42	−11
Hemoglobina	−486	−2,861	1,726	−6	−17	5
Serum albumina	6,346	390	11,698	16	−15	48
Diabetic ESRDa	11,623	3,284	19,771	25	−19	68
AMI before CABG	9,179	607	17,198	6	−38	47
COPDa	130	−10,790	11,319	−76	−146	−1
Vintage	−600	−843	−327	−9	−11	−7
Hospital stays after CABG	−336	−1,022	283	−2	−6	2
Percentile of initial Medicare expenditureb	47,437	28,687	66,159	−236	−336	−139
Discharge to self care / outpatient	1,516	−6,483	9,048	18	−18	56
Cardiac rehabilitation	2,904	−7,028	11,940	76	22	129

^aMeasured at HD start

^baccumulated during the 6-month entry period.

Abbreviations: CABG, coronary artery bypass grafting; HD, hemodialysis; ESRD, end-stage renal disease; AMI, acute myocardial infarction; COPD, chronic obstructive pulmonary disease