1. A device capable of displaying physiological data and an indication of the reliability of the physiological data, the device comprising: a plurality of physiological data acquired from an output of a physiological sensor, wherein the output is related to one or more physiological parameters of a patient; a plurality of signal quality measures derived from the physiological sensor output; a confidence measure derived from at least one of the plurality of signal quality measures and corresponding to at least one of the plurality of physiological data; and a display presenting data representative of the confidence measure and presenting data representative of the plurality of physiological data.