{"type":"trials","record":{"id":42391,"source_id":"clinicaltrials-gov","external_id":"NCT01788423","title":"Evaluating Hearing Aid Service Delivery Models","brief_summary":"The purpose of this study is to compare the outcomes for two different hearing-aid delivery models. In one model, the audiologist selects and fits the hearing aid and, in the other model, the consumer does this directly.","overall_status":"Completed","phases":[],"study_type":"INTERVENTIONAL","sponsor":"Indiana University","enrollment":323,"countries":["United States"],"start_date":"2012-11-01","completion_date":"2018-02-28","last_update_date":"2019-07-23","source_url":"https://clinicaltrials.gov/study/NCT01788423","editorial_summary":"A registered study indexed because it matched monitored longevity research terms. Registry status: Completed. Registration does not establish safety or effectiveness.","first_seen_at":"2026-09-25T01:25:34.048307+00:00","last_seen_at":"2026-09-25T06:25:04.647+00:00","metadata":{"sex":"ALL","acronym":null,"age_range":"55 Years to 79 Years","comparator":"Placebo","organization":"Indiana University","interventions":["hearing aid"],"registry_source":"ClinicalTrials.gov","outcome_measures":["Profile of Hearing Aid Performance Benefit (PHAB) — two times: at hearing-aid fit and at 6-weeks post-fit","Connected Speech Test (CST) Benefit — two times: at hearing-aid fit and at 6-weeks post-fit"],"design_description":"RANDOMIZED · PARALLEL · TREATMENT · TRIPLE","source_has_results":true},"controlled_terms":["Presbycusis","Aging","Hearing Loss","hearing aid"],"relevance_confidence":60,"source_quality_score":100,"freshness_score":50,"publication_state":"published","match_explanation":"Source terminology contains: presbycusis.","quality_checked_at":"2026-09-25T06:25:07.732232+00:00","duplicate_cluster_key":"id:nct01788423","duplicate_of_id":null,"evidence_snapshot":{"status":"structured","version":1,"duration":"2012-11-01 to 2018-02-28","comparator":"Placebo","confidence":"structured-source","population":"ALL · 55 Years to 79 Years","provenance":{"duration":"start_date and completion_date","comparator":"registry arm fields","population":"registry eligibility fields","intervention":"registry intervention fields","participants":"enrollment","study_design":"study_type and registry design fields","evidence_stage":"phases","reported_outcome":"not available","outcomes_measured":"registry outcome-measure fields"},"generated_at":"2026-09-25T06:25:04.668Z","intervention":["hearing aid"],"participants":323,"study_design":"RANDOMIZED · PARALLEL · TREATMENT · TRIPLE","subject_scope":"Human clinical study registration","evidence_stage":"Phase not reported","safety_context":"Eligibility, adverse-event details, and clinical decisions must be checked in the official registry and with qualified clinicians.","source_support":"Structured registry protocol metadata; no finding-level conclusion is generated.","main_limitation":"This is a study registration. No reusable structured result is available here, so it cannot show whether the intervention worked or was safe.","reported_outcome":null,"outcomes_measured":["Profile of Hearing Aid Performance Benefit (PHAB) — two times: at hearing-aid fit and at 6-weeks post-fit","Connected Speech Test (CST) Benefit — two times: at hearing-aid fit and at 6-weeks post-fit"],"regulatory_context":"Trial registration is not regulatory approval and does not establish that an intervention is available."},"clinical_trial_topics":[{"topic_slug":"hearing-aging","is_published":true,"match_reasons":["Source terminology contains: presbycusis.","Source terminology supplies longevity context: aging.","Study type is explicitly identified as INTERVENTIONAL."],"matched_fields":["controlled terminology","controlled context","study type"],"relevance_score":60,"intelligence_topics":{"name":"Hearing ageing","slug":"hearing-aging"}}],"content_sources":{"name":"ClinicalTrials.gov","homepage_url":"https://clinicaltrials.gov/"}},"canonical_url":"https://www.immortal.life/trials/42391","automation_disclosure":"Generated automatically from cited source metadata. No scientist, clinician, researcher, editor, or human reviewer evaluates this publication before release."}