TABLE 1.
Subject demographics and preoperative and postoperative hearing levels (dB HL). Subjects are ordered by cochlear duct length.
| Case | Age (years) | Ear | Sex | Reported Deafness Duration‡ | Etiology | CDL (mm) | AID (°) | Post-Op Interval (Months) | Pre-Operative (dB HL) | Post-Operative (dB HL) | Threshold Shift (dB HL) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||||||||||||
| 125 Hz | 250 Hz | 500 Hz | LFPTA | 125 Hz | 250 Hz | 500 Hz | LFPTA | 125 Hz | 250 Hz | 500 Hz | LFPTA | |||||||||
| 1 | 79 | L | M | 15 | Unknown | 30.8 | 650 | 1 | 55 | 60 | 75 | 63 | 65 | 95 | 115 | 91 | 10 | 35 | 40 | 28 |
| 2 | 71 | R | F | 19 | Unknown | 31.8 | 670 | 2 | 60 | 60 | 60 | 60 | 95 | 105 | 115 | 105 | 35 | 45 | 55 | 45 |
| 3 | 84 | R | F | 23 | Unknown | 32.0 | 668 | 1 | 30 | 25 | 35 | 30 | 70 | 80 | 90 | 80 | 40 | 55 | 55 | 50 |
| 4 | 78 | L | F | 8 | Unknown | 32.4 | 641 | 5 | 45 | 50 | 80 | 58 | 70 | 95 | 110 | 91 | 25 | 45 | 30 | 33 |
| 5 | 79 | L | F | 10 | Unknown | 33.1 | 700 | 1 | 30 | 35 | 80 | 48 | 80 | 95 | 110 | 95 | 50 | 60 | 30 | 47 |
| 6 | 65 | R | F | 30 | Unknown | 33.2 | 675 | 1 | 55 | 90 | 100 | 82 | 80 | 105 | 115 | 100 | 25 | 15 | 15 | 18 |
| 7 | 79 | L | M | 15 | NIHL | 33.3 | 626 | 3 | 50 | 55 | 60 | 55 | 95 | 105 | 105 | 101 | 45 | 50 | 45 | 46 |
| 8 | 59 | L | F | 1 | Unknown | 33.7 | 700 | 1 | 50 | 50 | 65 | 55 | 75 | 90 | 115 | 93 | 25 | 40 | 50 | 38 |
| 9 | 23 | L | M | 20 | Unknown | 34.1 | 602 | 5 | 45 | 75 | 95 | 72 | 80 | 100 | 105 | 95 | 35 | 25 | 10 | 23 |
| 10 | 75 | L | M | 16 | Unknown | 34.2 | 575 | 1 | 50 | 65 | 70 | 62 | 80 | 100 | 105 | 95 | 30 | 35 | 35 | 33 |
| 11 | 48 | R | M | 1 | Unknown | 34.7 | 646 | 2 | 45 | 55 | 90 | 63 | 60 | 80 | 85 | 75 | 15 | 25 | -5 | 12 |
| 12 | 69 | R | M | 15 | NIHL | 35.1 | 636 | 3 | 65 | 70 | 75 | 70 | 80 | 90 | 105 | 91 | 15 | 20 | 30 | 21 |
| 13 | 85 | L | M | 20 | Unknown | 35.3 | 622 | 2 | 60 | 70 | 70 | 67 | 65 | 85 | 85 | 78 | 5 | 15 | 15 | 11 |
| 14 | 80 | L | M | 15 | Unknown | 35.3 | 546 | 1 | 60 | 75 | 80 | 72 | 80 | 100 | 115 | 98 | 20 | 25 | 35 | 26 |
| 15 | 65 | R | M | 27 | NF1 | 35.5 | 581 | 2 | 60 | 80 | 95 | 78 | 65 | 95 | 105 | 88 | 5 | 15 | 10 | 10 |
| 16 | 62 | R | F | 20 | Unknown | 35.8 | 533 | 4 | 50 | 55 | 60 | 55 | 50 | 75 | 90 | 71 | 0 | 20 | 30 | 16 |
| 17 | 80 | L | M | 6 | NIHL | 36.1 | 590 | 1 | 60 | 65 | 65 | 63 | 85 | 90 | 90 | 88 | 25 | 25 | 25 | 25 |
| 18 | 38 | L | F | 5 | Unknown | 36.3 | 594 | 1 | 65 | 70 | 70 | 70 | 70 | 90 | 95 | 86 | 5 | 20 | 25 | 16 |
| 19 | 62 | L | M | 1 | Unknown | 36.5 | 574 | 2 | 45 | 70 | 80 | 65 | 65 | 95 | 115 | 91 | 20 | 25 | 35 | 26 |
| Mean | 67.4 | 14.1 | 34.2 | 623 | 2.1 | 51.6 | 61.8 | 73.9 | 62.5 | 74.2 | 93.2 | 103.7 | 90.1 | 22.6 | 31.3 | 29.7 | 27.6 | |||
| SD | 16.4 | 8.7 | 1.7 | 49.1 | 1.4 | 10.1 | 15.4 | 15.4 | 11.5 | 11.5 | 8.7 | 11.0 | 9.0 | 14.3 | 14.1 | 15.9 | 12.8 | |||
AID, angular insertion depth; CDL, cochlear duct length; NIHL, noise induced hearing loss; NF1, neurofibromatosis type 1; LFPTA, low-frequency pure-tone average at 125, 250, and 500 Hz.
‡
. Reported duration of deafness considered severe-profound in years.