Table 4.

Relationships of eGFR with annualized healthcare charges by multivariate linear regression in the polycystic kidney disease sample free of baseline diabetes and cardiovascular disease (n = 1781)^a

Variable	Parameter Estimate ($ per year [SEM])	P
Total Charges
Intercept	3403 (7540)	0.65
Age (per year)	318 (156)	0.04
Male gender	−4664 (3641)	0.20
eGFR
>90 ml/min level	reference
61 to 90 ml/min level	3344 (4966)	0.50
31 to 60 ml/min level	10,788 (5386)	0.045
Per ml/min <30	4914 (403)	<0.0001
Total Medical Charges
Intercept	3042 (7541)	0.69
Age (per year)	291 (156)	0.06
Male gender	−5581 (3660)	0.13
eGFR
>90 ml/min level	reference
61 to 90 ml/min level	3460 (4975)	0.49
31 to 60 ml/min level	9604 (5384)	0.07
Per ml/min ≤30	4805 (402)	<0.0001
Inpatient Charges
Intercept	−5199 (26,584)	0.85
Age (per year)	1339 (520)	0.01
Male gender	−27,079 (13,632)	0.048
eGFR
>90 ml/min level	reference
61 to 90 ml/min level	5722 (19,262)	0.77
31 to 60 ml/min level	10,428 (19,194)	0.59
Per ml/min <30	1713 (1106)	0.12
Pharmacy Charges
Intercept	595 (735)	0.42
Age (per year)	35 (15)	0.02
Male gender	681 (353)	0.05
eGFR
>90 ml/min level	reference
61 to 90 ml/min level	108 (484)	0.82
31 to 60 ml/min level	1428 (518)	0.006
Per ml/min <30	128 (38)	0.0009

^aCharges were adjusted to the $2008 medical component of the Consumer Price Index.