Andrea, H., Beurskens, A. J. H. M., Kant, I. J., Davey, G. C. L., Field, A. P., &van Schayck, C. P. (2004). The relation between pathological worrying and fatigue in a working population.

  Objective This study aimed to explore cross-sectional and longitudinal associations between pathological worry and fatigue in a working population. Methods In employees with very low or very high fatigue levels, psychometrics of the Penn State Worry Questionnaire (PSWQ; measuring pathological worry) and the Checklist Individual Strength (CIS; measuring fatigue) were examined and their cross-sectional …