Table 1.

Descriptive statistics for representative transplant recipients and donor comorbidities and outcomes over time

	1996 to 2009	1998	2002	2006	P for Trend
Total number of recipients	150,075	12,485	14,573	15,813
Recipient age and demographics
age between 21 and 30 years	10.99%	12.91%	10.04%	8.84%	<0.001
age between 31 and 50 years	45.44%	50.72%	45.85%	38.04%	<0.001
age between 51 and 60 years	25.62%	23.13%	26.18%	28.76%	<0.001
age greater than 60 years	17.85%	13.24%	17.93%	24.35%	<0.001
male	59.76%	59.14%	59.23%	61.44%	0.01
Comorbidities
recipient has diabetes	26.35%	25.91%	27.42%	27.62%	0.01
recipient was on dialysis	75.34%	77.41%	77.19%	75.89%	0.27
recipient had heart or vascular disease	18.87%	18.47%	18.29%	20.49%	<0.001
recipient had hypertension	74.84%	69.75%	76.63%	81.18%	<0.001
recipient had prior transplant(s)	11.71%	11.43%	11.54%	12.08%	0.22
Wait
average wait time in years (for deceased donor recipients)	1.98	1.63	2.08	2.12	<0.001
Recipient outcomes
3-year graft survival	82.16%	81.66%	82.42%	84.82%	<0.001
3-year patient survival	90.28%	90.29%	90.29%	91.73%	0.32
Outcome variation across center
standard deviation of unadjusted 3-year graft survival	16.1%	7.84%	8.60%	7.30%	0.72
standard deviation of unadjusted 3-year patient survival	17.0%	5.14%	6.35%	5.59%	0.76
Donor characteristics
deceased donor	63.8%	68.7%	61.6%	62.6%	<0.001
expanded criteria donors	10.85%	10.46%	8.50%	12.35%	<0.001
average total HLA antigen mismatches (A, B, and DR loci)	3.39	3.13	3.33	3.60	<0.001
average HLA-A antigen mismatches	1.19	1.14	1.18	1.23	<0.001
average HLA-B antigen mismatches	1.29	1.16	1.25	1.40	<0.001
average HLA-DR antigen mismatches	1.14	1.08	1.13	1.19	<0.001
peak panel reactive antibody (PRA)	12.02	11.57	11.83	12.10	<0.001
donor weight (kg)	75.89	72.89	74.87	78.34	<0.001
donor age	38.34	36.65	37.61	39.54	<0.001
cold ischemia time (hours)	13.93	15.20	13.37	13.23	<0.001
donor history of diabetes	3.10%	2.19%	3.38%	4.34%	<0.001
donor history of hypertension	18.42%	19.23%	18.74%	18.19%	0.23