Transplant Statistics: Annual Report

Blood Type		Year of Waiting List Registration
		1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
O	Number of Registrations	308	161	84	80	100	104	147	162	233	331
	10th Percentile of TT (Days)	15	12	37	44	24	42	31	31	35	37
	25th Percentile of TT (Days)	56	35	137	183	112	164	100	98	85	98
	Median TT (Days)	149	102	876	642	371	355	438	390	272	+
	Median TT 95% C.I. Lower Bound	117	84	352	351	296	288	277	271	210	+
	Median TT 95% C.I. Upper Bound	190	145	+	979	655	635	602	802	374	+
A	Number of Registrations	283	161	81	90	92	129	139	171	218	338
	10th Percentile of TT (Days)	16	9	17	30	40	19	14	15	16	10
	25th Percentile of TT (Days)	47	42	46	116	110	97	53	40	54	65
	Median TT (Days)	129	107	328	418	331	331	227	154	181	345
	Median TT 95% C.I. Lower Bound	91	86	118	214	182	214	154	115	122	255
	Median TT 95% C.I. Upper Bound	158	147	708	1,154	548	541	378	265	223	463
B	Number of Registrations	75	41	30	23	32	36	31	44	60	85
	10th Percentile of TT (Days)	7	13	56	91	167	50	21	19	17	11
	25th Percentile of TT (Days)	56	92	210	336	268	99	85	101	52	57
	Median TT (Days)	156	503	+	+	761	311	283	212	369	197
	Median TT 95% C.I. Lower Bound	108	114	+	+	455	173	109	120	113	90
	Median TT 95% C.I. Upper Bound	261	+	+	+	+	+	+	469	+	+
AB	Number of Registrations	31	17	14	8	7	10	13	19	16	35
	10th Percentile of TT (Days)	15	35	9	*	*	2	1	4	3	11
	25th Percentile of TT (Days)	44	42	16	*	*	15	23	50	21	51
	Median TT (Days)	73	77	106	*	*	77	58	118	154	298
	Median TT 95% C.I. Lower Bound	54	51	16	*	*	15	23	69	61	76
	Median TT 95% C.I. Upper Bound	190	119	+	*	*	1,104	342	+	318	+

Source: OPTN/SRTR Data as of August 1, 2001.

(*) = Not determined due to small cell N (0 to 9).

(+) = 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.