@ patients from the Action in Diabetes and Vascular disease : preterAx and diamicroN-MR Controlled Evaluation ( ADVANCE ) trial who were randomized to intensive glucose control or standard glucose control and followed up for a median of @years were categorized into two groups : effective glycaemic control -LSB- haemoglobin A@c ( HbA@c ) @ % or a proportionate reduction in HbA@c over @ % -RSB- or ineffective glycaemic control ( HbA@c > @ % and a proportionate reduction in HbA@c less than or equal to @ % ) .