Part I: Factors inflencing professional functioning 37 Figure 1. Flowchart Data collection The data were collected retrospectively by review of patient files. Outcomes of the hearing survey and the hearing assessments were entered into Castor, an electronic database (Castor, 2019). by the author and a research assistant. Data entry was checked in a sample of 50 percent of the cases. Information not available in patient files were noted as missing. Hearing assessment The hearing assessments consisted of unaided pure-tone and speech audiometry for all patients. At the ENT-Audiology Department, speech reception tests in noise are not routinely performed in all patients, but only if understanding speech in a noisy environment is important for jobperformance.Therefore, speech reception tests innoise were performed depending on the profession and the associated auditory demands. Pure-tone and speech audiometry Pure-tone and speech audiometry (ISO 8253–1, 1989) were performed in a soundisolated booth using calibrated clinical audiometers (AC40 and Decos audioNigma) and TDH 39 headphones. According to the hospital protocol, pure-tone thresholds for air and bone conduction were reported in decibel (dB) hearing level (HL) at
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