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 2 Association of depth of Carhart effect assessed preoperatively with change in average cochlear reserve after surgical treatment.
| Carhart effect | n | ABG Delta (dB)Average | ABG Delta (dB)SD | ABG Delta (dB)Me | ABG Delta (dB)Min | ABG Delta (dB)Max | |
|---|---|---|---|---|---|---|---|
| OTO | |||||||
| <15 dB | 45 | 15.2 | 5.7 | 15.0 | −21.3 | 41.3 | |
| >15 dB | 94 | 12.6 | 6.6 | 11.3 | −6.3 | 22.5 | =0.012 |
| OME | |||||||
| <15 dB | 48 | 7.1 | 3.5 | 3.8 | 0.0 | 21.3 | |
| >15 dB | 25 | 3.8 | 2.0 | 4.2 | 3.8 | 14.2 | =0.004 |
| COM | |||||||
| <15 dB | 165 | 3.5 | 11.9 | 3.8 | −27.5 | 35.0 | |
| >15 dB | 155 | 3.7 | 12.5 | 6.3 | −26.3 | 21.3 | =0.442 |
| OTO – otosclerosis; OME – exudative otitis media; COM – chronic otitis media; 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. | |||||||