Psychometric properties of Work Ability Index in the light of comparative survey study

This article is focused on psychometric properties of Work Ability Index. The authors have undertaken this task in order to check whether WAI may be considered as a reliable, valid and universal measurement of ability to work in the nursing profession. As an empirical basis authors used the data set obtained from Nurses’ Early Exit Study—coming from 10 European countries, an extensive international survey research, conducted on almost 40,000 nurses. As a measure of work ability, WAI may be treated as internally coherent, although one item seems to be meaningless and unnecessary. Additionally, WAI should be considered a very predictive and cross-nationally stable instrument.