However , at the 12-month no-treatment follow-up visit , both SII and SIG had greater weight losses than SI ( SII : 3.1 % [ 1.8-4 .4 ] ; SIG : 4.5 % [ 3.2-5 .8 ] ; SI : 1.2 % [ -0.1 -2.6 ] ; P 's 0.05 ) .