61 57. Although no longer requiring involuntary placement, a patient may nevertheless still need treatment and/or a protected environment in the outside community. In this connection, the CPT has found, in a number of countries, that patients whose mental state no longer required them to be detained in a psychiatric establishment nevertheless remained in such establishments, due to a lack of adequate care/accommodation in the outside community. For persons to remain deprived of their liberty as a result of the absence of appropriate external facilities is a highly questionable state of affairs. G. Final remarks 58. The organisational structure of health-care services for persons with psychiatric disorders varies from country to country, and is certainly a matter for each State to determine. Nevertheless, the CPT wishes to draw attention to the tendency in a number of countries to reduce the number of beds in large psychiatric establishments and to develop community-based mental health units. The Committee considers this is a very favourable development, on condition that such units provide a satisfactory quality of care. It is now widely accepted that large psychiatric establishments pose a significant risk of institutionalisation for both patients and staff, the more so if they are situated in isolated locations. This can have a detrimental effect on patient treatment. Care programmes drawing on the full range of psychiatric treatment are much easier to implement in small units located close to the main urban centres.