Part II: Evaluation of professional functioning 85 not calculated for the variables general health condition and the BHI, because the aural rehabilitation was not expected to change these variables. Change scores were also not calculated for the variable ‘feeling that something should change at work’, since differences in this variable would be difficult to interpret at group level. For example, increased need for change might reflect an unsatisfactory result of the rehabilitation, but might also reflect increased awareness of the impact of work circumstances on the hearing loss complaints. In a secondary analysis, the differences between the subscales from the CPHI were calculated and assessed using paired t-tests. We performed a post hoc power analysis based on the effect size of NFR. Our sample size would give a power of 74% and 5% significance in a paired mean comparison test. To identify the factors associated with a decrease inNFR and LE, regression analyses were performed using the change scores (outcome and determinants). Every determinant was used separately in a univariate regression model and hierarchical multiple analyses were performed. For the primary and the secondary outcome measures, the first block consisted of the potential confounders age, gender, educational level, and BHI. In the next blocks, the determinants were added one by one. For each block, we calculated the change in amount of variance. Data were analyzed using the Statistical Package for Social Sciences (SPSS) version 26.0 (Armonk New York USA). For all tests, the type I error was set to 0.05 and all tests were two-sided. Results Table 2 presents comparisons between the correlation coefficients presented by Van der Hoek-Snieders et al. (2020) and the correlation coefficients that were found in the current study. In line with the previous findings, NFR was moderately associated with ‘feeling that something should change at work’ (r = .46, p < .01), LE (r = .54, p < .01), general health condition (r = .33, p = .01), and personal adjustments (r = -.37, p < .01). In accordance with the previous findings, LE was moderately associated with ‘feeling that something should change at work’ (r = .46, p < .01), auditory work demands (r = .58, p < .01), and personal adjustments (r = -.56, p < .01). A non-significant association was found between LE and the BHI (r = .07, p = .63).
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