An indicator of whether non-smoking status has been confirmed, was attempted but not confirmed, or confirmation was not attempted, by carbon monoxide (CO) validation at 52 weeks follow-up after the QUIT DATE.

A machine called a carbon monoxide monitor or Smokelyser is used to detect the amount of carbon monoxide in the breath and therefore to detect whether someone is still smoking. For the purposes of CO validation, any CO reading of less than 10 ppm should be taken as an indication that the client is not smoking at the time.

Classification:

a.	Non-smoking status confirmed by CO validation
b.	Not confirmed - CO validation attempted
c.	Not confirmed - CO validation not attempted

 

This attribute is also known by these names:

Context	Alias
plural	NON SMOKING CONFIRMED AT 52 WEEKS