The reductions in DHS after 2 , 4 and 8 weeks were significant for both groups , however , when considering Schiff scale , the Test treatment provided greater DHS reduction after 2 weeks ( 44.5 % for Test versus 27.7 % for Control ) and 4 weeks ( 55.2 % for Test and 40.5 % for Control ) , while after 8 weeks there was no significant difference between groups ( 71.1 % for Test versus 61.1 % for Control ) .