RESPECTIVE VALUE OF PARAMETERS OF RELATIV E COMPLEXITY INDEX BETA

The Relative Complexity Index beta (RCI beta) has been devised as an i ndicator of the relative complexity and cost of anaesthesia. It takes into account the type of anaesthesia, the duration, the type of surger y and the patients' ASA status. This study analyses the relative weigh t of each component of RCI by a multiple regression analysis. The resu lts show the pre-eminence of the surgical procedure in the formula. Th e weight of surgical procedure is responsible of 80 p. cent of the mod el's variance. In these conditions, the RCI beta cannot be accepted as an accurate complexity index of anaesthesia.