105 5 DISCLOSURE IN THE MILITARY - A QUANTITATIVE STUDY Statistical analyses For beliefs, attitudes, and needs surrounding (non-)disclosure, descriptive analyses were performed. Chi-square tests and Mann-Whitney U-tests were used for comparisons between those who disclosed/intended to disclose and those who did not, as variables were not normally distributed. To examine factors associated with (non-)disclosure, two separate analyses were performed. For personnel with MHI, a logistic regression was performed with nondisclosure decision as the dependent variable (0=disclosure,1=non-disclosure). For personnel without MHI, an ordinal regression was performed, as disclosure intention had more than two categories. As the assumption of proportional odds was violated at first, the categories ‘very unlikely’ and ‘unlikely’ were merged, resulting in the dependent variable non-disclosure intention with categories 1=very-likely, 2=likely, and 3=(very)- unlikely. To prevent loss of information ‘likely’ and ‘very-likely’ were not combined. Fear of negative career consequences, social rejection, discrimination, self-stigma, shame, fear of receiving blame, fear of gossip and confidentiality concerns were combined into one (mean) measure of stigma, as they are all aspects of stigma (30). Together these items formed a reliable scale (awith MHI=.89, awithout MHI=.91). There were no missing data, as forced response answers were used during data acquisition and a complete case analysis was used. All analyses were performed using SPSS- 25. Ethical considerations Written informed consent was obtained from all subjects/patients. The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008. All procedures involving human subjects/patients were approved by the Tilburg School of Social and Behavioral Sciences Ethics Review Boards (approval number RP324) and the Dutch Military Ethics Review Board. RESULTS Participant characteristics Response rate After removing duplicates (caused by personnel going on multiple deployments) and personnel who had left active service from the original sample, a total of N=1627 eligible respondents were left. Of those, 63% (N=1025) started the questionnaire, and 54% (N=878) fully completed it and were used for further analysis. Compared to personnel who completed the questionnaire, those who did not complete
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