A capnographic system, the system comprising one or more processors configured to: (i) receive an initial capnographic measurement from a breath monitoring device, at least when the breath monitoring device is attached to a patient, (ii) receive a primary value of at least one attribute, other than the initial capnographic measurement, characteristic of the patient, (iii) assign, from a database containing at least one set of secondary values corresponding to primary values of the at least one attribute, a secondary value corresponding to the primary value of the at least one attribute, and (iv) calculating, based on a combination of the initial capnographic measurement and the secondary value, a refined capnographic measurement.
