TABLE 1.
Descriptive statistics by group for age, speech perception, language ability, non-verbal IQ, and memory span.
| CI (n = 64) | HA (n = 37) | DLD (n = 16) | TD (n = 58) | |
| Mean (SD) (range) | Mean (SD) (range) | Mean (SD) (range) | Mean (SD) (range) | |
| Age [years] | 10.1 (1.8) (6.9–12.9) | 8.7 (2.2) (5.5–12.7) | 9.7 (1.8) (6.5–12.5) | 9.0 (2.0) (5.7–12.8) |
| Speech perception (monosyllables) | 87.2 (7.0) (68–100) | 88.4 (11.0) (48–100) | 95.6 (8.4) (70–100) | 99.0 (1.6) (92–100) |
| Speech perception (sentences) | 96.3 (5.6) (77–100) | 95.8 (6.0) (70–100) | 93.6 (16.1) (42–100) | 99.7 (0.8) (96–100) |
| Speech-in-noise perception (SiN) | 2.6 (2.5) (−3.2–10.5) | 0.6 (3.1) (−3.7–13.6) | −0.8 (2.3) (−4.1–4.4) | −2.9 (1.2) (−5.4–−0.3) |
| Language ability | 76.1 (18.4) (42–114) | 85.2 (15.5) (47–117) | 66.9 (15.7) (44–102) | 102.7 (14.9) (57–135) |
| Non-verbal IQ | 97.7 (11.2) (75–120) | 98.5 (16.1) (75–135) | 90.6 (11.8) (75–115) | 103.6 (13.6) (80–145) |
| Memory span | 6.3 (2.0) (2–11) | 7.8 (2.4) (2–13) | 5.3 (2.4) (2–10) | 8.5 (2.2) (4–15) |
SD, standard deviation; Speech perception (monosyllables) (% correct words); speech perception (sentences) (% correct words); SiN perception measured by age-adjusted HINT SRT in noise (dB SNR); language ability measured by The Core Language Index of the Clinical Evaluation of Language Fundamentals (CELF-4) (standard score); non-verbal IQ measured by Raven (standard score); memory span measured by CELF Digit span subtest (scaled score).