Organisational resourcesThe German

Organisational resources
The German version of the Copenhagen Psychosocial Questionnaire (COPSOQ) was used to evaluate job-related and psychosocial factors at work.The questionnaire includes 12 scales; we analysed the following eight scales of the COPSOQ: emotional and quantitative job demands (workload, working under pressure), job resources (quality of leadership, feedback,opportunities for development, social support, sense of community, social relationships, degrees of freedom at
work and influence at work). Items are scored on a five-point Likert scale and transformed to a scale ranging from 0 (minimum value, eg, ‘do not agree at all’) to 100 points (maximum value, eg, ‘fully agree’). Previous investigations proved quality criteria of the COPSOQ.We also verified them: Cronbach’s α coefficients ranged between α=0.71 to α=0.85, while intercorrelations ranged between r=0.30 and r=0.68.