The test diet reduction in HbA@c units of -@ % ( -@ mmol/mol ) ( @ % CI -@ % to -@ % -LSB- -@ to -@ mmol/mol -RSB- ) was greater than that for the control diet ( -@ % -LSB- -@ mmol/mol -RSB- -LSB- @ % CI -@ % to -@ % ( -@ to -@ mmol/mol ) -RSB- , P = @ ) , with the greatest benefit observed in those with higher systolic blood pressure ( SBP ) .