The goal of this study was to discover, weather using different multidimensional exploratory techniques in self-assessing occupational threats by knowledge workers brings logical classification of variables and if obtained classifications are similar. In a theoretical part of the study, on a basis of literature studies peculiarity of knowledge-based work and specific occupational threats were identified. Then, in the empirical part of the study, they were examined as observable variables with the use of a questionnaire method on a sample of 500 knowledge workers. Variables were classified using two multidimensional exploratory techniques: factor analysis and cluster analysis. The obtained results were compared. It turned out, that the results achieved with the use of the two techniques are similar, yet they differ in detail. The implications are of both cognitive and utilitarian character. In first case - the analysis revealed and explained the structure of perception of knowledge workers' occupational threats, in second - the classification of variables allows to measure perception of occupational threats and use the results e. g. when designing trainings on occupational health and safety and to better fit them to this group of employees. The paper's contribution are novel ways of quantifying and measuring occupational threats posed to knowledge workers as well as a comparison of the proposed methods.(original abstract)