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Work Ability Index (WAI) values in a sample of the working population in Poland.Juszczyk, Grzegorz; Czerw, Aleksandra Izabela; Religioni, Urszula; Olejniczak, Dominik; Walusiak-Skorupa, Jolanta; Banas, Tomasz; Mikos, Marcin; Staniszewska, Anna; Nofer Institute of Occupational Medicine (2019-03-22)Introduction: Ability to work is most often defined as a relationship between a person’s resources and requirements specific to a particular type of work. It is the result of interaction between job requirements in terms of physical and mental strain, capabilities and skills of the employee, as well as his/her health condition and own evaluation of functioning in a given organizational and social situation. Objective: The primary objective of the study was to evaluate the current value of the Work Ability Index (WAI) in a sample of employees in Poland. Material and methods: The study sample was selected purposefully from 422,000 employees covered by the largest occupational health provider in Poland. The standard WAI questionnaire provided by CAWI (Computer-Assisted Web Interview) methodology was voluntary and completed anonymously by 688 employees within 12 months (0.16% response rate). The results were statistically analyzed using the Pearson’s chi-squared test and correlation coefficient, independent-sample T test and one-way analysis of variance (p<0.05). Results: It was found that the average value of WAI was 37.5 ± 7.7, and 37% of the participants represented low to moderate ability to work. The results showed no significant correlation between the WAI value and its 7 compounds and demographic variables. Nonetheless, a dependency between WAI level and industrial branch was observed.