Table 3.
Changes in parameters measured as compared to their values prior to cochlear implantation.
| Prior to surgery |
6 months after surgery |
12 months after surgery |
24 months after surgery |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | Median | SD | Mean | Median | SD | Mean | Median | SD | Mean | Median | SD | |
| SR 65-dB sound pressure level (SPL) | 7.9 | 0.0 | 13.2 | 40.4** | 43.8 | 35.9 | 41.6** | 35.0 | 34.2 | 43.2** | 46.3 | 25.2 |
| NCIQ 1 | 40.1 | 39.4 | 20.9 | 59.6** | 60.0 | 20.0 | 62.1** | 65.0 | 22.4 | 57.6** | 60.0 | 18.1 |
| NCIQ 2 | 42.4 | 40.0 | 19.2 | 56.1** | 55.0 | 20.5 | 54.9** | 55.0 | 21.0 | 53.2** | 52.5 | 19.4 |
| NCIQ 3 | 64.4 | 67.5 | 22.6 | 72.1 | 75.0 | 20.4 | 66.9 | 72.2 | 20.6 | 71.7 | 71.9 | 24.0 |
| NCIQ 4 | 42.6 | 41.7 | 17.5 | 50.9** | 45.0 | 19.7 | 52.9** | 52.5 | 18.9 | 53.8** | 50.0 | 21.4 |
| NCIQ 5 | 37.9 | 37.5 | 18.2 | 49.1** | 47.5 | 22.8 | 49.3** | 47.5 | 23.0 | 47.5** | 43.8 | 18.6 |
| NCIQ 6 | 41.5 | 40.0 | 22.5 | 51.2** | 50.0 | 25.7 | 53.0** | 52.8 | 23.3 | 50.3** | 50.0 | 18.9 |
| NCIQ total | 53.8 | 43.2 | 58.7 | 56.6** | 55.1 | 18.5 | 57.5** | 55.5 | 19.8 | 55.8** | 56.8 | 15.2 |
| TQ E | 9.0 | 8.0 | 6.0 | 7.4 | 4.0 | 6.8 | 7.1* | 5.0 | 6.6 | 7.2 | 7.0 | 6.4 |
| TQ C | 6.9 | 7.5 | 4.5 | 5.7 | 4.0 | 5.0 | 5.4* | 4.5 | 4.4 | 5.6 | 4.5 | 4.5 |
| TQ E + C | 15.9 | 14.0 | 10.0 | 13.1 | 9.0 | 11.5 | 12.3* | 9.5 | 10.9 | 12.7* | 13.0 | 10.6 |
| TQ I | 8.2 | 9.0 | 4.1 | 6.1** | 5.0 | 5.2 | 5.6** | 5.5 | 4.7 | 5.8** | 6.0 | 4.3 |
| TQ A | 6.6 | 6.0 | 4.8 | 5.2 | 5.0 | 4.9 | 5.1 | 5.5 | 4.7 | 5.2 | 5.5 | 4.5 |
| TQ SI | 2.5 | 2.0 | 2.4 | 1.8* | 0.0 | 2.5 | 1.9 | 1.0 | 2.3 | 2.3 | 1.5 | 2.7 |
| TQ SO | 1.8 | 1.5 | 1.7 | 1.3 | 0.0 | 2.0 | 1.8 | 0.5 | 2.4 | 1.5 | 1.0 | 1.9 |
| TQ total | 35.0 | 33.5 | 19.6 | 27.5* | 23.0 | 24.0 | 26.7** | 26.5 | 22.8 | 27.6* | 30.0 | 22.3 |
| OI quiet | 2.4 | 2.4 | 0.9 | 3.4** | 3.6 | 1.0 | 3.4** | 3.4 | 0.8 | 3.4** | 3.4 | 0.9 |
| OI noise | 1.8 | 1.6 | 0.6 | 2.7** | 2.6 | 1.0 | 2.7** | 2.5 | 0.9 | 2.6** | 2.4 | 0.8 |
| OI localization | 1.9 | 2.0 | 0.8 | 2.8** | 3.0 | 1.0 | 2.7** | 2.5 | 1.0 | 2.7** | 2.5 | 1.0 |
| OI total | 2.1 | 1.9 | 0.7 | 3.0** | 2.9 | 0.9 | 3.0** | 2.9 | 0.8 | 2.9** | 2.8 | 0.8 |
Asterisks indicate significant differences between respective variables when compared to their values prior to surgery as per Wilcoxon signed-rank test; *p ≤ 0.05, **p ≤ 0.01.
SR, speech recognition (Freiburg Monosyllabic Test, 65-dB SPL); NCIQ, German version of Nijmegen Cochlear Implantation Questionnaire (1 basic sound perception; 2 advanced sound perception; 3 speech production; 4 self-esteem; 5 activity; and 6 social interactions); TQ, Tinnitus Questionnaire (E, emotional distress; C, cognitive distress; E + C, combined psychological distress; I, intrusiveness; A, auditory perception difficulties; SI, sleep disturbances; SO, somatic complaints; total, total score); OI, Oldenburg Inventory.