| Study type | Retrospective review | Retrospective chart review | Clinical trial | Prospective follow-up |
| Number of patients / ears | 108 ears | 138 ears | 33 ears | 26 pediatric patients |
| Follow-up duration | 3 months (short-term) | >1 year (mean 4.4 years) | 12 months | 1 year post-op (long-term) |
| Pre- & post-Op hearing measure | Air conduction ≤40 dB | Three-tone AC PTA; pre 59.6 dB HL | Air-bone gap (success based) | Air conduction – 64 dB to – 39 dB; speech in noise tests |
| Main findings / outcomes | 70.5% achieved successful hearing; prognostic factors include middle ear height & tegmen displacement | 64% stable hearing; mean improvement – 34 dB; some decline over time | 72.7% success at 2 months; 63.6% success at 12 months; success linked to Jahrsdoefer score | Significant audiometric improvements; binaural hearing (binaural squelch) achieved at 1 year; subjective QoL improvements |
| Prognostic factors for success | Middle ear height, tegmen displacement, J score | Not specified explicitly | Jahrsdoefer score & syndromic status; success depends on score | Not specified; improvements correlate with GBI scores |
| Subjective outcomes / QoL | Not specified | Not specified | Not specified | Significant improvements in hearing quality and life scores |
| Comments | Indicators improve prognostication in canaloplasty | Stability over years with some decline | Success more common with higher Jahrsdoefer scores | Objective and subjective benefits, binaural hearing in adolescents |