TABLE 11.

Rate of positive outcomes by different age at first implantation groupings and presence of complex medical history (%)

Outcome	≤12 months	12–24 months	>24 months	Statistical Significance
Open-set	94.1	84.2	80.6	NS
Non-complex	93.5	84.5	84.7	NS
Complex	100.0	81.8	50.0	–a
Oral communication exclusively	88.2	62.2	30.6	p ≤ 0.001
Non-complex	90.3	64.3	35.0	p ≤ 0.001
Complex	66.7	50.0	8.3	–a
Oral receptive	88.2	64.3	36.1	p ≤ 0.001
Oral expressive	94.1	68.4	38.9	p ≤ 0.001

^aCell sizes too small for statistical validity.

NS = not significant.