[Risk of inappropriateness and efficiency assessment of hospitals].

We evaluated with the Data Envelopment Analysis (DEA) 13 decision making units (DMU) at IDI -IRCCS for the years 2000 and 2001. Input variables were: cost for medical personnel, cost for non medical personnel and number of beds; output variables was the number of discharged patients weighted with DRG. Later in a second model we delete the cases considered to be at "high risk" to be inappropriate for treatment as inpatients.