Table 1 Constructs of HBM

• Susceptibility: personal perception on the risk of acquiring a certain disease or condition

• Severity: personal perception of the seriousness of a certain disease, behaviour or condition

• Benefits: personal perceptions on the effectiveness and positive consequences when adopting a new behaviour

• Barriers: personal perception of the obstacles that may prevent him/her to adopt a new behaviour

Added constructs:

• Cues to action: factors that trigger a behaviour

• Self efficacy: personal perception on his/her ability to adopt a behaviour