The financing of the Belgian hospitals is based on a system taking into account the length of hospitalization of a given patient according to his/her pathology, his/her age and his/her geriatric characteristics. This system encourages all hospital to lower the hospitalization duration to the national average for these criteria. This results in better efficiency in the management of hospitalizations but also means a swifter transfer to structures exempted from this system such as revalidation units, nursing homes and psychiatric units. An assessment of the differences in the medical practice, in terms of quality and outcomes of care, is essential for any reform willing to reduce medical costs.

Pain management is part of the quality indicators within hospitals. Pain is defined by the International Association for the Study of Pain as "an unpleasant sensory and emotional experience, associated to present or potential tissue damage, or described in terms of such a damage". Several studies have showed that pain affects the quality of life and impacts the daily activities. Acute or chronic pain can cause adverse symptoms such as sleep disturbance, appetite loss, decreased concentration, mood changes and the disruption of familial, work and social activities. Pain might also slow down revalidation processes. A study performed by Aprile et al showed that pain negatively influenced the rehabilitation program of a quarter of the patients having had a stroke. The functional recovery was slower and the costs were higher.

The aim of this study is to determine if the systematic evaluation of the pain of a patient hospitalized in a revalidation unit has an impact on his/her length of stay.

Inclusion Criteria:

• Sequential inclusion of all patients hospitalized in the chronic revalidation hospital unit of the CHU Brugmann - Queen Astrid site

Exclusion Criteria:

• Pathological cognitive state (MMS<23/30)