No significant differences in further weight loss between groups ( P = 0.138 ) [ mean ( SEM ) : -3.4 % ( 1.1 % ) for all meal provision only ; -3.4 % ( 0.6 % ) self-directed then all meal provision ; -1.1 % ( 1.2 % ) all meal provision then self-directed ] were seen after a further 12 weeks .