A computer-implemented method for indicating a long-term stress level of a person by means of a data processing unit, including the steps of acquiring stressor data having a set of stressor data items; analyzing stressor data values of the stressor data items by means of an artificial neural network to generate data representing a stress level, wherein the artificial neural network (ANN) is trained to provide output representing the stress level based on the stressor data values and an indication of previous stress state; and signaling the stress level.