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Data collection up to 17.75 (SD = 3.08; range 13 to 28) years post implant demonstrated that the majority of participants who underwent implantation at an early age achieved discrimination of speech sounds without lipreading (CAP category 4.00). Educational, vocational, and occupational level achieved by this cohort were significantly poorer compared with the German and worldwide population average. Children implanted today who are younger at implantation, and with whom more advanced up-to-date CIs are used, are expected to exhibit better auditory performance and have enhanced educational and occupational opportunities. Compared with the circumstances immediately after World War II in the 20th century, children with hearing impairment who use these implants have improved prospects in this regard.
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Illg et al. (2017) studied this question.
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