22 January 2025 : Database Analysis
Role of the Carhart Effect and Outcomes from Surgery: A Retrospective Study of 532 Patients with Conductive Hearing Loss Due to Otosclerosis, Otitis Media with Effusion, and Chronic Otitis Media
Kamila Szpak
1ABCDEF, Agnieszka Wiatr 2BCDE, Maciej Wiatr 2ADEG*
DOI: 10.12659/MSM.947061
Med Sci Monit 2025; 31:e947061
Table 3 Otosclerosis. Association of preoperative depth of Carhart effect with change in average values of cochlear reserve after surgical treatment in the considered age groups.
| Carhart effect | n | Delta ABG Average (dB) | Delta ABG SD (dB) | Delta ABGMe (dB) | Delta ABGmin (dB) | Delta ABGmax (dB) | OTO |
|---|---|---|---|---|---|---|---|
| Age group 18–29 years old | |||||||
| <15 dB | 22 | 16.9 | 9.8 | 20.0 | 1.3 | 27.5 | |
| >15 dB | 11 | −6.3 | 5.2 | −3.7 | −6.3 | 2.5 | <0.001 |
| Age group 30–59 years old | |||||||
| <15 dB | 21 | 7.3 | 12.1 | 13.8 | −21.3 | 41.3 | |
| >15 dB | 78 | 14.1 | 6.9 | 11.3 | 6.3 | 22.5 | =0.001 |
| Age group over 60 years old | |||||||
| <15 dB | 2 | 18.1 | 4.4 | 18.4 | 15.0 | 21.3 | |
| >15 dB | 5 | 21.3 | 5.6 | 20.1 | 15.0 | 25.0 | =0.246 |
| OTO – otosclerosis; n – number of patients; ABG – air-bone gap; dB – decibel; – significance level; SD – standard deviation; Me – median; Min – minimum; Max – maximum; Delta – shift in BC after performed treatment. | |||||||