Subthreshold affective disorders: a useful concept in psychiatric epidemiology?

Improved methods are badly needed for classifying all those persons in the wider community who are in need of medical treatment and help for psychological disorder, but do not satisfy operational criteria laid down in the official guidelines. This cannot, however, be achieved simply by lowering operational thresholds in these systems. Further research on clinical and psycho-social characteristics of the common mental disorders is called for, and in many societies a favourable setting is that of primary health care, where a move towards pragmatic, comprehensive classification of community health problems is already under way.