Melin L, Scott B, Lindberg P, Lyttkens L
Br J Audiol. 1987 May;21(2):91-7. doi: 10.3109/03005368709077782.
From a waiting list consisting of hearing-impaired patients waiting for hearing aids to be fitted, 39 subjects who at interview also stated that they had tinnitus took part in an experimental group study with the aim of investigating the effect of a hearing aid on tinnitus. No subject had any previous experience of hearing aids. The subjects were randomly allocated to a treatment and a waiting list control group. After an initial interview, the routine programme for the fitting of hearing aids started in the treatment group, while the waiting list control group had to wait for 6 weeks before starting the same hearing aid rehabilitation programme. The hearing aids were fitted exclusively for hearing purposes. As expected, the hearing aids improved the hearing capacity, but they did not reduce tinnitus as recorded on a visual analogue scale. According to information obtained at the final interview, there were significant differences in tinnitus between subjects who used their aid for more than 2 hours daily and those who used it for less than 2 hours. However, the results of scaling (pre- and post-fitting) did not support this finding. The discrepancy between the scaling and interview data is probably due to demand characteristics.
从一个由等待安装助听器的听力受损患者组成的等候名单中，选取了39名在访谈中表示自己患有耳鸣的受试者，参与了一项旨在研究助听器对耳鸣影响的实验组研究。所有受试者此前均无使用助听器的经验。受试者被随机分为治疗组和等候名单对照组。经过初次访谈后，治疗组开始了常规的助听器安装程序，而等候名单对照组则需等待6周才能开始相同的助听器康复程序。这些助听器专为听力目的而安装。正如预期的那样，助听器提高了听力，但在视觉模拟量表上记录的耳鸣情况并未减轻。根据末次访谈获得的信息，每天使用助听器超过2小时的受试者与每天使用时间少于2小时的受试者在耳鸣方面存在显著差异。然而，量表测量（安装前和安装后）的结果并不支持这一发现。量表测量数据与访谈数据之间的差异可能是由于需求特征造成的。
