Abstract: A method for assessing the state of the condition of asthma in a patient may involve sensing individual patient data using one or more sensors on or near the patient, transmitting the individual patient data to a processor, comparing, with the processor, the individual patient data with baseline patient data related to the patient and/or population data related to a patient population comparable to the patient, to provide comparison data, and providing an assessment of the current state of the patient's asthma condition, based on the comparison data. In some embodiments, the individual patient data is related to at least one physiological parameter of the patient, and at least one of the sensors is a passive sensor that does not require the patient to apply it or activate it.