Patient activation is a key concept which refers to people’s willingness and capacity to take on the role of managing their own health and health care.
Measuring patient activation is of value at the individual level (e.g. tailoring interventions) through to program evaluation (e.g. efficacy in enhancing activation).
Insignia Health's licenced "Patient Activation Measure" (PAM) is the dominant tool for measuring this - are there any others?
http://www.kingsfund.org.uk/sites/files/kf/field/field_publication_file/supporting-people-manage-health-patient-activation-may14.pdf