An apparatus for detecting a physiological condition in a person, comprising input means for receiving at least two physiological parameters, processing means for determining, from the received physiological parameters, a result signal indicative of the presence or onset of said physiological condition, and output means for generating an output indicative of the result signal. The apparatus further comprises storage means for storing a look-up table comprising a plurality of entries, each entry corresponding to a pre-calculated probability of the presence or onset of said physiological condition, the pre-calculated probabilities being determined by means of a mathematical process from previously monitored physiological parameters； and the processing means is adapted to process the received at least two physiological parameters to identify one of the plurality of entries of the look-up table, and to determine said result signal from the identified entry of the look-up table.
