Dr. Peter McKenna:

On a monitoring basis, the figure that is usually looked at is the positive predictive value. That tells us the ones the laboratory is reporting as abnormal are genuinely abnormal. The rate between the laboratories the Deputy has in front of her is within the acceptable range of the early to mid-80s and that is considered to be an acceptable figure.

As regards the other question about whether there was a closed mind, the answer is "No." If there was a closed mind there would not have been a review. The very fact that people looked back on the individual results meant they were looking to see whether the headline figures were enough or whether, if they reviewed the individuals concerned who developed cancer, they could see if there was error. That would suggest to me there was no closed mind.