“…Consequently, no causal conclusions can be drawn. Existing longitudinal research within the field of occupational health tried to provide evidence for a causal relationship between characteristics of the work situation and mental health, thereby mainly focusing on the so-called normal causal relationship, i.e., how do characteristics of the work situation affect mental health over time [1,10]. The reversed relationship, i.e., how does mental health influence Journal of Psychosomatic Research 66 (2009) 137 -145 the work situation, has hardly been examined so far [11,12].…”