Trends of characteristics and outcomes of donors and recipients of deceased donor liver transplantation in the United States: 1990 to 2013

Table 1 Donor characteristics n (%)

Donor characteristics	Total	5 yr periods				P-value1
		Period 1	Period 2	Period 3	Period 4
		1990-1994	1995-1999	2000-2004	2005-2009
Age, mean (SD)	39.1 (17.4)	32.3 (15.2)	37.0 (17.4)	40.6 (17.6)	42.4 (17.2)	< 0.001
Gender						< 0.001
Female	27884 (39.6)	3831 (35.4)	6397 (40.1)	8077 (41.0)	9579 (40.1)
Male	42492 (60.4)	6998 (64.6)	9573 (59.9)	11625 (59.0)	14296 (59.9)
BMI, mean (SD)	25.9 (5.7)	23.8 (4.6)	24.8 (5.2)	26.0 (5.6)	27.0 (6.0)	< 0.001
BMI						< 0.001
Underweight	3310 (4.7)	502 (4.6)	1077 (6.7)	910 (4.6)	821 (3.4)
Normal	29093 (41.3)	3655 (33.8)	7698 (48.2)	8730 (44.3)	9010 (37.7)
Overweight	20441 (29.1)	1582 (14.6)	4461 (27.9)	6345 (32.2)	8053 (33.7)
Obese - Class I	7921 (11.3)	384 (3.6)	1369 (8.6)	2459 (12.5)	3709 (15.5)
Obese - Class II	2722 (3.9)	84 (0.8)	367 (2.3)	801 (4.1)	1470 (6.2)
Obese - Class III	1496 (2.1)	47 (0.4)	196 (1.2)	446 (2.3)	807 (3.4)
Unknown	5394 (7.7)	4575 (42.3)	802 (5.0)	12 (0.1)	5 (0.0)
Ethnicity						< 0.001
White	51594 (73.3)	8747 (80.8)	12334 (77.2)	14444 (73.3)	16069 (67.3)
Black	9195 (13.1)	1044 (9.6)	1741 (10.9)	2481 (12.6)	3929 (16.5)
Hispanic	7460 (10.6)	812 (7.5)	1396 (8.7)	2144 (10.9)	3108 (13.0)
Asian	1327 (1.9)	135 (1.3)	255 (1.6)	395 (2.0)	542 (2.3)
Other	662 (0.9)	47 (0.4)	164 (1.0)	224 (1.1)	227 (1.0)
Unknown	139 (0.2)	44 (0.4)	80 (0.5)	15 (0.1)
Causes of death						< 0.001
Anoxia	7848 (11.2)	483 (4.5)	1256 (7.9)	2028 (10.3)	4081 (17.1)
Cerebrovascular/stroke	29788 (42.3)	3778 (34.9)	6645 (41.6)	8929 (45.3)	10436 (43.7)
Head trauma	28087 (39.9)	3576 (33.0)	7592 (47.5)	8171 (41.5)	8748 (36.6)

¹Contrast between period 1 and 4. CNS: Central nervous system; SD: Standard deviation; BMI: Body mass index.