Table 1

Baseline characteristics of patients with and without recovery of preoperative tinnitus

Recovery (n=35)No recovery (n=52)
Demographics
 Age in years, median (IQR)67.7 (58.3–71.2)60.0 (51.7–66.2)
 Male, n (%)20 (57)26 (50)
Deafness-related factors
 Prelinguality, n (%)3 (9)3 (6)
 Duration of deafness-operated ear in years, median (IQR)9.7 (2.1–34.6)10.3 (2.5–23.1)
 Aetiology of deafness-operated ear, n (%)
  Progressive18 (51)17 (33)
  Congenital3 (9)6 (12)
  Meningitis1 (3)3 (6)
  Postnatal infection4 (11)5 (10)
  Traumatic1 (3)3 (6)
  Otosclerosis2 (6)5 (10)
  Sudden deafness0 (0)3 (6)
  Menière’s disease5 (14)9 (17)
  Iatrogenic1 (3)1 (2)
 Preoperative CVC score, median (IQR)33.0 (0.0–58.0)45.0 (24.3–64.0)
Missing: 2
 Preoperative PTA threshold operated ear in dBHL, mean (SD)100.8 (16.8)
Missing: 1
106.7 (17.3)
Missing: 1
Tinnitus-related factors
 Tinnitus duration preoperative in years, median (IQR)10.0 (4.6–16.3)
Missing: 25
17.3 (10.0–30.0)
Missing: 14
 Tinnitus severity preoperative, n (%)
  Mild2 (14)13 (27)
  Moderate7 (50)19 (39)
  Severe5 (36)
Missing: 21
17 (35)
Missing: 3
 Localisation tinnitus, n (%)
  Right ear6 (17)4 (8)
  Left ear9 (26)7 (13)
  Bilateral20 (57)41 (79)
 Depression preoperative, n (%)2 (6)3 (6)
Missing: 1
 Anxiety preoperative, n (%)1 (3)
Missing: 1
2 (4)
Missing: 1
Surgery-related factors
 Follow-up duration in years, median (IQR)5.3 (2.4–7.1)3.5 (1.5–6.1)
 Localisation cochlear implant versus tinnitus, n (%)
  Cochlear implant contralateral to tinnitus side9 (26)4 (8)
  Cochlear implant ipsilateral to tinnitus side6 (17)7 (13)
  Unilateral cochlear implant, bilateral tinnitus20 (57)41 (79)
 Surgical approach, n (%)
  Cochleostomy26 (74)36 (69)
  Round window8 (23)
Missing: 1
12 (23)
Missing: 4
 Insertion, n (%)
  Full34 (97)46 (88)
  Partial1 (3)6 (12)
 Brand cochlear implant, n (%)
  Cochlear13 (37)25 (48)
  MedEl17 (49)23 (44)
  Advanced Bionics5 (14)4 (8)
 Postoperative CVC in percentage score, median (IQR)83.3 (52.0–88.0)85.9 (78.2–94.0)
 Difference in PTA threshold operated ear in dBHL, median (IQR)25.7 (9.4–37.0)
Missing: 3
16.6 (4.3–28.4)
Missing: 8
  • PTA: average threshold over frequencies  0.125–8 kHz.

  • CVC, Consonant-Vowel-Consonant test; dBHL, decibel hearing level; PTA, pure-tone average.