Nevertheless, some studies, including the
2004 Belgian Health Survey discussed above, throw some light on this problem in so far as they focus on measuring notions such as psychological illbeing (Book II of the Health Interview Survey – Belgium 2004, pp 204-209): “The psychological well-being assessed in the 2004 Belgian Health Su
rvey is measured by means of an instrument (GH
Q-12, General Health Questionnaire) that uses scores ranging from 0 to 12. A h
...[+++]igher score indicates a higher probability/severity of psychological ill-being.