Early prediction of median survival among a large AIDS surveillance cohort

BMC Public Health

Table 3 Predicted versus True 0.50 Quantiles using the 0.15 Quantile as a Predictor Variable based on a linear model with an interaction term.

	Data as of December 31, 1996					Data as of December 31, 2001
			Observed Quantiles
Cohort	n	largest follow-up time (months)	0.15 (A)	0.50 (B)	Predicted 0.50 Quantile† (C)	largest follow-up time (months)	"True" 0.15 Quantile§ (D)	True 0.50 Quantile‡ (E)	Difference (C – E)
831	140	167	2	12	9	227	2	12	-3
832	154	164	2	11	10	224	1	11	-1
833	204	161	1	10	9	221	1	10	-1
834	205	158	1	10	9	218	1	11	-2
841	277	155	2	10	11	215	1	10	1
842	315	152	1	9	10	212	1	11	-1
843	397	149	2	12	12	209	1	11	1
844	418	146	2	10	12	206	1	9	3
851	531	143	1	10	11	203	1	10	1
852	624	140	1	10	11	200	1	10	1
853	718	137	1	11	12	197	1	10	2
854	689	134	1	11	12	194	1	10	2
861	876	131	1	10	13	191	1	10	3
862	955	128	1	10	13	188	1	10	3
863	1113	125	1	11	13	185	1	11	2
864	1110	122	1	14	14	182	1	15	-1
871	1316	119	1	15	14	179	1	14	0
872	1474	116	1	16	14	176	1	15	-1
873	1484	113	1	17	15	173	2	17	-2
874	1425	110	2	17	16	170	2	17	-1
881	1649	107	2	18	17	167	2	18	-1
882	1658	104	2	19	17	164	3	19	-2
883	1759	101	2	18	17	161	2	18	-1
884	1693	98	1	18	16	158	1	18	-2
891	1930	95	2	19	18	155	2	18	0
892	2187	92	2	20	18	152	2	19	-1
893	2047	89	3	20	20	149	3	21	-1
894	1997	86	2	19	19	146	2	18	1
901	2265	83	2	21	19	143	3	22	-3
902	2243	80	3	21	21	140	4	22	-1
903	2285	77	3	19	21	137	3	20	1
904	2139	74	3	20	22	134	3	20	2
911	2611	71	5	21	24	131	5	22	2
912	2543	68	4	23	23	128	4	23	0
913	2845	65	4	23	24	125	4	23	1
914	2930	62	5	24	25	122	5	24	1
921	3227	59	7	27	28	119	8	27	1
922	2920	56	7	28	28	116	7	28	0
923	2971	53	7	28	28	113	7	27	1
924	3061	50	7	30	29	110	7	29	0
931	3264	47	9	32	31	107	9	31	0
932	2903	44	8	32	31	104	8	32	-1
933	2788	41	9	*	32	101	9	32	0
934	2624	38	9	*	32	98	9	40	-8
941	2766	35	8	*	32	95	9	46	-14
942	2518	32	7	*	31	92	8	80	-49
943	2335	29	9	*	33	89	9	*
944	2203	26	9	*	34	86	8	*
951	2451	23	10	*	35	83	9	*
952	2245	20	11	*	36	80	10	*
953	1949	17	8	*	34	77	9	*
954	1860	14	10	*	36	74	9	*
961	1894	11	*	*	*	71	12	*
962	1488	8	5	*	31	68	16	*
963	1225	5	*	*	*	65	16	*
964	475	2	*	*	*	62	9	*

ISSN: 1471-2458