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	59	77	80	77	62	58	65	63	53	60
	10th Percentile of TT (Days)	109	132	75	181	359	115	99	196	129	391
	25th Percentile of TT (Days)	420	550	354	536	888	592	891	+	402	+
	Median TT (Days)	+	+	+	+	+	+	+	+	+	+
	Median TT 95% C.I. Lower Bound	+	+	+	+	+	+	+	+	+	+
	Median TT 95% C.I. Upper Bound	+	+	+	+	+	+	+	+	+	+
A	Number of Registrations	49	65	56	66	61	73	55	51	32	38
	10th Percentile of TT (Days)	47	34	98	59	60	46	132	38	58	180
	25th Percentile of TT (Days)	165	289	212	148	198	261	796	165	201	+
	Median TT (Days)	1,093	1,030	+	856	+	+	+	+	+	+
	Median TT 95% C.I. Lower Bound	689	536	+	329	+	+	+	+	+	+
	Median TT 95% C.I. Upper Bound	+	+	+	+	+	+	+	+	+	+
B	Number of Registrations	11	10	14	12	8	17	16	19	15	11
	10th Percentile of TT (Days)	150	30	342	272	*	147	48	3	23	177
	25th Percentile of TT (Days)	182	802	411	295	*	465	118	198	413	+
	Median TT (Days)	1,402	+	434	+	*	+	646	+	+	+
	Median TT 95% C.I. Lower Bound	493	+	412	+	*	+	418	+	+	+
	Median TT 95% C.I. Upper Bound	+	+	+	+	*	+	+	+	+	+
AB	Number of Registrations	9	7	12	4	7	5	4	5	7	6
	10th Percentile of TT (Days)	*	*	53	*	*	*	*	*	*	*
	25th Percentile of TT (Days)	*	*	55	*	*	*	*	*	*	*
	Median TT (Days)	*	*	175	*	*	*	*	*	*	*
	Median TT 95% C.I. Lower Bound	*	*	84	*	*	*	*	*	*	*
	Median TT 95% C.I. Upper Bound	*	*	+	*	*	*	*	*	*	*

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.