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

		Expressive Communication (EC) Scale – Standard Score		Auditory Comprehension (AC) Scale – Standard Score
Age at implant (in months)	Duration of Use	Expected Standard Score	68% Prediction Interval	Expected Standard Score	68% Prediction Interval
12	42	104	86-122	102	86-119
13	41	100	82-118	100	83-116
14	40	96	79-114	97	81-114
15	39	93	75-110	95	79-111
16	38	89	72-107	93	77-109
17	37	86	69-103	91	74-107
18	36	83	66-100	88	72-105
19	35	80	63-97	86	70-103
20	34	77	60-95	85	68-101
21	33	75	58-92	83	67-99
22	32	73	55-90	81	65-97
23	31	71	53-88	80	63-96
24	30	69	51-86	78	62-94
25	29	67	50-84	77	60-93
26	28	66	48-83	75	59-91
27	27	64	47-82	74	58-90
28	26	63	46-80	73	57-89
29	25	62	45-79	72	56-88
30	24	61	44-79	71	55-87
31	23	61	43-78	70	54-86
32	22	60	43-78	69	53-86
33	21	60	48-78	69	52-85
34	20	60	43-78	68	52-84
35	19	60	43-78	68	51-84
36	18	61	43-79	67	51-84
37	17	61	43-79	67	50-84
38	16	62	43-80	67	50-84