| 11555830 |
Juneja R, Hirsch IB, Naik RG, Brooks-Worrell BM, Greenbaum CJ, Palmer JP: Islet cell antibodies and glutamic acid decarboxylase antibodies, but not the clinical phenotype, help to identify type 1 (1/2) diabetes in patients presenting with type 2 diabetes. Metabolism. 2001 Sep;50(9):1008-13.
This study was undertaken to determine which type 1 diabetes-associated autoantibodies and what clinical characteristics are most useful to identify patients with type 1 (1/2) diabetes. We studied 125 patients, recently diagnosed clinically with type 2 diabetes for the presence of islet cell antibodies (ICA), insulin autoantibodies (IAA), antibodies to glutamic acid decarboxylase (GADAb), and IA-2a (IA-2Ab). Patients with a diagnosis of type 2 diabetes who met all of the following criteria at diagnosis were studied: age > or = 30 years, no history of ketonuria or ketoacidosis, and not requiring insulin treatment. Thirty-six patients (29%) were positive for at least 1 antibody. Thirty-two (26%) were ICA positive and 20 (16%) GADAb positive. Insulin autoantibodies and IA-2Ab occurred less frequently in 2 (1.6%) and 8 (6.4%) patients, respectively. There was no significant difference in the ages at diagnosis between the Ab (+) and Ab (-) patients, age in years (range) 47.2 (32 to 64) versus 51.2 (31 to 77), respectively, P =.06. Body mass index (BMI) was different in the 2 groups, with Ab (+) patients being less obese, BMI (range) 28.3 kg/m (2) (17.6 to 54.9) versus 32.0 kg/m (2) (19.2 to 68.8), respectively, P =.01. Clinical presentation of diabetes was more commonly symptomatic with polyuria and polydipsia in Ab (+) patients, while in Ab (-) patients, diagnosis was more often incidental, P =.002. However, more than 95% of patients overlapped in both age and BMI irrespective of antibody status. Similarly, 42% of Ab (+) patients had their diabetes diagnosed incidentally, while 29% of Ab (-) patients presented with polyuria and polydipsia. We therefore conclude that screening with antibodies, mainly ICA and GAD, but not age, BMI, or clinical presentation should be used to identify type 1 (1/2) diabetes. |
1(0,0,0,1) |