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	1,715	1,688	1,683	1,595	1,882	1,704	1,639	1,747	1,578	1,517
	10th Percentile of TT (Days)	20	28	30	25	29	41	41	38	32	27
	25th Percentile of TT (Days)	85	118	105	87	97	117	114	131	124	112
	Median TT (Days)	742	1,085	852	721	684	686	668	746	+	+
	Median TT 95% C.I. Lower Bound	550	757	621	526	571	555	505	576	+	+
	Median TT 95% C.I. Upper Bound	1,082	+	1,538	1,072	902	974	895	1,044	+	+
A	Number of Registrations	1,545	1,670	1,526	1,514	1,683	1,552	1,518	1,547	1,412	1,364
	10th Percentile of TT (Days)	11	12	10	12	12	17	17	19	14	11
	25th Percentile of TT (Days)	42	48	41	39	42	54	52	57	51	42
	Median TT (Days)	229	266	223	179	202	225	204	255	226	223
	Median TT 95% C.I. Lower Bound	194	232	186	157	178	192	173	210	198	190
	Median TT 95% C.I. Upper Bound	265	315	272	211	251	275	236	311	267	287
B	Number of Registrations	427	444	466	475	506	459	454	476	409	415
	10th Percentile of TT (Days)	14	16	14	12	17	18	21	19	19	14
	25th Percentile of TT (Days)	49	71	64	41	58	72	56	60	54	47
	Median TT (Days)	235	348	264	253	240	303	200	279	263	152
	Median TT 95% C.I. Lower Bound	193	274	213	152	173	225	167	198	196	125
	Median TT 95% C.I. Upper Bound	372	529	460	325	334	413	263	437	446	221
AB	Number of Registrations	166	163	158	143	178	158	145	170	143	156
	10th Percentile of TT (Days)	4	10	7	6	6	9	12	6	6	6
	25th Percentile of TT (Days)	18	35	21	20	27	22	30	25	18	15
	Median TT (Days)	102	121	98	86	107	92	75	80	82	68
	Median TT 95% C.I. Lower Bound	67	77	64	64	68	55	55	65	62	39
	Median TT 95% C.I. Upper Bound	172	201	167	164	154	149	104	141	146	143

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.