The influence of psychosocial stress, personal factors, environmental factors and nature of illness on prolonged absence from work/ which factors either prolonged or reduced the period of absence from work. Reason of sick report / medical treatment / kind of doctors, hospitals/ opinion about medical treatment / experience of illness and future expectations / education, occupation and working situation / living conditions / youth and situation in parental family / dwelling conditions / income situation / secondary relation patterns / leisure / stressful life events / drastic changes in private sphere / health / role changes / personal or familial crises. Background variables: basic characteristics/ housing situation/ household characteristics/ characteristics of parental family/household/ place of work/ occupation/employment/ income/capital assets/ education/ organizational membership