- HbA1c ≥48 mmol/mol and ≤53 mmol/mol (≥ 6.5% and ≤ 7.0%). At discretion of the study physician, subjects with HbA1c >53 mmol/mol and <58 mmol/mol (>7.0% and < 7.5%) controlled solely through diet and exercise are also allowed to participate.