Detection of decline in estimated glomerular filtration rate in patients with type 2 diabetes by cystatin C-based equations

Table 1 Criteria for diagnosis of diabetes

Tests	Results
Fasting plasma glucose (fasting is defined as no caloric intake for at least eight hours)1	≥ 126 mg/dL (7.0 mmol/L)
Or, 2-hour plasma glucose during OGTT (the test should be performed as described by the World Health Organization, using a glucose load containing the equivalent of 75-g anhydrous glucose dissolved in water)1	≥ 200 mg/dL (11.1 mmol/L)
Or, HbA1c (the test should be performed in a laboratory using a method that is NGSP certified and standardized to the DCCT assay)1	≥ 6.5% (48 mmol/mol)
Or, in a patient with classic symptoms of hyperglycemia or hyperglycemic crisis, a random plasma glucose	≥ 200 mg/dL (11.1 mmol/L)

¹In the absence of unequivocal hyperglycemia, diagnosis requires two abnormal test results from the same sample or in two separate test samples.

OGTT: Oral glucose tolerance test; HbA1c: Glycated hemoglobin; NGSP: National Glycohemoglobin Standardization Program; DCCT: Diabetes Control and Complications Trial.