Children below the second height centile: effect of adjustment for regression to the mean on difference between actual height standard deviation score (SDS) and mid-parental SDS. Children below the second height centile: effect of adjustment for regression to the mean on difference between actual height standard deviation score (SDS) and mid-parental SDS. Charlotte M Wright, and Tim D Cheetham Arch Dis Child 1999;81:257-260 Copyright © BMJ Publishing Group Ltd & Royal College of Paediatrics and Child Health. All rights reserved.