Improvement in Outcomes Unaided and aided Saliba et al. 2005 pure tone audiometry, Canada and France unaided and aided sound field audiometry, Speech III III-3 8 adults 5-8 weeks intelligibility in quiet and noise les at Prospective, various levels with with/without constant noise (65 dB), Subjective outcomes using APHAB VSB was not superior to Pre and post op pure Schmuziger et al. conventional hearing aids in tone thresholds, 2006 Switzerland audiologic terms, but should Speech intelligibility in be considered for patients quiet using Freiburger were HA are contraindicated monosyllables at 65 dB, Speech IV III-3 20 adults not stated intelligibility in noise Retrospective chart (70 dB) SPL, review Subjective outcomes using the IOI-HA and GBI and a not validated questionnaire Based on the cost per QALY, Snik et al. 2006 Direct cost of the middle-ear implantation Netherlands middle ear implant, proved to be a cost-effective IV III-1 13 adults 6-24 months Patients satisfaction, and justified health care Quality adjusted life Prospective, cost intervention in the years, Cost per QALY utility study Netherlands
Saliba et al. 2005 Canada and France III III-3 8 adults 5-8 weeks Unaided and aided pure tone audiometry, unaided and aided sound field audiometry, Speech intelligibility in quiet and noise les at various levels with constant noise (65 dB), Subjective outcomes using APHAB Improvement in Outcomes Prospective, with/without Schmuziger et al. 2006 Switzerland IV III-3 20 adults not stated Pre and post op pure tone thresholds, Speech intelligibility in quiet using Freiburger monosyllables at 65 dB, Speech intelligibility in noise (70 dB) SPL, Subjective outcomes using the IOI-HA and GBI and a not validated questionnaire VSB was not superior to conventional hearing aids in audiologic terms, but should be considered for patients were HA are contraindicated Retrospective chart review Snik et al. 2006 Netherlands IV III-1 13 adults 6-24 months Direct cost of the middle ear implant, Patients satisfaction, Quality adjusted life years, Cost per QALY Based on the cost per QALY, middle-ear implantation proved to be a cost-effective and justified health care intervention in the Netherlands Prospective, cost utility study