Figure 1From: Work-related psychosocial events as triggers of sick leave - results from a Swedish case-crossover study Schematic picture of the time periods used in the analyses. 1a shows the case and control periods used for the exposures "unpleasant tasks" and "very stressful work situation". 1b shows the case and control periods used for the exposures "problems in relationships with superior", "problems in the relationship with colleagues" and "discriminated, bullied or sexually harassed".Back to article page