Chronologic Age at Test = 4 years, 6 months (± 2 months).

Age at Implant (in months)	Duration of Use	Expected Standard Score at Age 4.5	68% Prediction Interval
12	42	103	86-119
13	41	101	84-117
14	40	99	83-115
15	39	97	81-113
16	38	95	79-111
17	37	94	77-110
18	36	92	76-108
19	35	90	74-106
20	34	88	72-105
21	33	87	71-103
22	32	85	69-101
23	31	84	67-100
24	30	82	66-98
25	29	81	64-97
26	28	79	63-95
27	27	78	61-94
28	26	76	60-92
29	25	75	59-91
30	24	74	57-90
31	23	72	56-89
32	22	71	55-87
33	21	70	54-86
34	20	69	52-85
34	19	68	51-84
36	18	67	50-83
37	17	65	49-82
38	16	64	47-82