She also questioned the validity of the data provided by GPs.
"People lie. I know that because people lie. My grandson, on a number of occasions, has been asked if he smokes and he always says no. He's lying."
She felt that doctors should not have to be enticed to provide medical data.
"How on earth can you say you are contributing to smoking cessation when all you do is ask, 'Do you smoke?'"
But hospital chief executive Julie Patterson said figures showed that when GPs engaged with their patients about their smoking behaviour this increased their likelihood of quitting.
"What research shows is that the more times people are challenged about their smoking status, the closer they get to making the personal decision that they want to give up."