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	438	519	617	729	830	866	901	973	1,008	925
	10th Percentile of TT (Days)	78	112	121	81	82	122	104	167	154	147
	25th Percentile of TT (Days)	187	294	340	272	243	351	332	468	615	+
	Median TT (Days)	462	616	681	838	884	1,320	1,246	+	+	+
	Median TT 95% C.I. Lower Bound	373	524	623	694	727	944	983	+	+	+
	Median TT 95% C.I. Upper Bound	527	801	885	1,217	1,219	+	+	+	+	+
A	Number of Registrations	383	504	534	611	682	713	779	785	790	744
	10th Percentile of TT (Days)	58	75	62	43	45	64	58	73	138	93
	25th Percentile of TT (Days)	157	225	206	167	160	164	284	277	473	330
	Median TT (Days)	384	502	663	676	715	643	910	823	+	+
	Median TT 95% C.I. Lower Bound	338	460	530	543	623	562	770	754	+	+
	Median TT 95% C.I. Upper Bound	502	583	879	870	896	717	1,270	952	+	+
B	Number of Registrations	100	135	142	163	176	177	199	241	271	215
	10th Percentile of TT (Days)	86	63	54	64	65	99	81	117	149	97
	25th Percentile of TT (Days)	192	187	183	242	178	290	253	374	353	304
	Median TT (Days)	409	400	440	1,124	641	1,652	916	+	+	+
	Median TT 95% C.I. Lower Bound	299	292	354	670	468	676	591	+	+	+
	Median TT 95% C.I. Upper Bound	676	537	760	+	915	+	+	+	+	+
AB	Number of Registrations	37	41	65	67	66	73	70	86	86	93
	10th Percentile of TT (Days)	36	60	46	15	35	26	27	106	102	97
	25th Percentile of TT (Days)	142	282	118	100	106	96	154	307	307	248
	Median TT (Days)	448	+	443	420	281	324	821	1,013	+	+
	Median TT 95% C.I. Lower Bound	179	+	299	193	162	189	306	537	+	+
	Median TT 95% C.I. Upper Bound	+	+	+	+	+	676	+	+	+	+

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.