The problem is quitting smoking is not an intervention. You cannot push a button and cause someone to quit smoking. You can "Talk to someone about quitting sm

The problem is quitting smoking is not an intervention. You cannot push a button and cause someone to quit smoking. You can "Talk to someone about quitting smoking", or "Send them to quit smoking meetings" or "Give them nicorette". These things are interventions. Quitting smoking in an intermediate result that is linked to positive outcomes.