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Transplant Statistics: Annual Report : Reference Tables

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Table 9.2
Time to Transplant
New Liver Waiting List Registrations, 1992 to 2001

Blood Type Year of Waiting List Registration
1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
Total Number of Registrations 4,814 5,533 6,227 7,339 8,058 8,631 9,543 10,514 10,883 11,136
10th Percentile of TT (Days) 6 7 7 10 12 15 19 27 28 29
25th Percentile of TT (Days) 31 42 49 66 93 113 140 183 194 169
Median TT (Days) 138 187 212 310 458 632 770 + + +
Median TT 95% C.I. Lower Bound 127 176 198 291 426 585 704 + + +
Median TT 95% C.I. Upper Bound 147 204 229 330 490 692 841 + + +
O Number of Registrations 2,238 2,502 2,884 3,455 3,766 4,012 4,477 4,980 5,075 5,131
10th Percentile of TT (Days) 7 9 8 14 15 22 26 32 40 42
25th Percentile of TT (Days) 40 51 58 96 138 179 194 242 289 240
Median TT (Days) 204 255 285 439 687 1,133 + + + +
Median TT 95% C.I. Lower Bound 181 225 245 382 615 950 + + + +
Median TT 95% C.I. Upper Bound 235 291 332 515 770 1,353 + + + +
A Number of Registrations 1,818 2,128 2,315 2,694 3,070 3,240 3,498 3,871 4,124 4,142
10th Percentile of TT (Days) 5 5 7 9 11 10 17 22 21 24
25th Percentile of TT (Days) 24 34 43 49 70 87 120 158 151 137
Median TT (Days) 108 144 167 231 323 442 545 964 + +
Median TT 95% C.I. Lower Bound 96 132 151 210 300 384 494 828 + +
Median TT 95% C.I. Upper Bound 122 161 189 257 352 505 605 + + +
B Number of Registrations 575 691 781 904 906 1,046 1,190 1,269 1,327 1,409
10th Percentile of TT (Days) 6 10 8 9 12 17 16 28 28 27
25th Percentile of TT (Days) 33 49 55 62 90 97 114 156 152 141
Median TT (Days) 139 204 256 273 421 499 577 902 + +
Median TT 95% C.I. Lower Bound 109 160 215 235 344 409 444 696 + +
Median TT 95% C.I. Upper Bound 173 257 318 319 496 662 737 + + +
AB Number of Registrations 183 212 247 286 316 333 378 394 357 454
10th Percentile of TT (Days) 5 3 6 6 6 7 8 17 14 13
25th Percentile of TT (Days) 16 18 24 38 38 45 63 88 95 76
Median TT (Days) 62 104 79 130 167 147 289 304 314 468
Median TT 95% C.I. Lower Bound 51 79 62 106 111 123 203 226 232 325
Median TT 95% C.I. Upper Bound 81 131 113 230 207 220 381 504 553 +

Source: OPTN/SRTR Data as of August 1, 2002.
(+) = Not determined due to insufficient follow-up; fewer than this percentile have transplanted.
 
TT = Time to Transplant in days.
This table takes a cohort of waiting list registrations and shows how long it takes for 10%, 25%, and 50% (the median) of those patients to be transplanted. These tables take the point of view of a patient who has
just been registered on a waiting list and take into account all of the things that can happen to the patient
after wait listing, including receiving a transplant, being removed from the waiting list, and dying.
See Technical Notes chapter for a full discussion of the methods used for this table.

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