At week @ , albiglutide significantly reduced HbA@c compared with placebo ( -@ % -LSB- -@ mmol/mol -RSB- ; P < @ ) , sitagliptin ( -@ % -LSB- -@ mmol/mol -RSB- ; P = @ ) , and glimepiride ( -@ % -LSB- -@ mmol/mol -RSB- ; P = @ ) .