title: The durability of sitagliptin in elderly patients with type 2 diabetes.
abstract: OBJECTIVE
  To evaluate the durability of sitagliptin and to assess changes in clinical chronic complications following sitagliptin monotherapy for 48 months in elderly patients with type 2 diabetes mellitus (T2DM).
  
  
  METHODS
  We enrolled 76 drug-naïve patients (40 women and 36 men; mean age: 71.3±11.7 years) with T2DM who received 25-100 mg of sitagliptin therapy from an outpatient clinic. The observational period for each patient was >48 months, beginning at the time sitagliptin therapy was initiated. The following were measured or performed at the beginning of each year: body mass index; serum total cholesterol, low-density lipoprotein, high-density lipoprotein; triglyceride levels; creatinine (Cr) levels; urine albumin and urine Cr; nonmydriatic fundusgraphy; and semiquantified neuropathy. The fasting plasma glucose and glycated hemoglobin (HbA1c) was measured every 3-6 months.
  
  
  RESULTS
  The change in HbA1c was significantly reduced after 6 months of therapy (7.1%±0.8% to 6.3%±0.2%). No changes in fasting plasma glucose, Cr, serum total cholesterol, triglyceride, low-density lipoprotein, high-density lipoprotein, body mass index, and microvascular complications were apparent. Using repeated measures to test the sequential changes in HbA1c from month 6 to month 48, the test of within-subjects effect was not significant (P=0.34).
  
  
  CONCLUSIONS
  Sitagliptin has a durable effect and stabilizes microvascular complication progression in elderly patients. This study can provide useful data for clinicians and health care professionals using sitagliptin monotherapy in the treatment of elderly patients with T2DM.
authors.affiliation: Division of Endocrinology and Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.
authors.forename: Ching-Jung
authors.initials: CJ
authors.lastname: Hsieh
authors.affiliation: Division of Endocrinology and Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.
authors.forename: Feng-Chih
authors.initials: FC
authors.lastname: Shen
mesh_terms: D000368:Aged; D001786:Blood Glucose; D015992:Body Mass Index; D003404:Creatinine / Q000097:blood; D048909:Diabetes Complications / Q000453:epidemiology*; D003924:Diabetes Mellitus, Type 2 / Q000188:drug therapy*; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006442:Glycated Hemoglobin; D006801:Humans; D007004:Hypoglycemic Agents / Q000627:therapeutic use*; D008055:Lipids / Q000097:blood; D008297:Male; D008875:Middle Aged; D011719:Pyrazines / Q000627:therapeutic use*; D000068900:Sitagliptin Phosphate; D014230:Triazoles / Q000627:therapeutic use*; D016482:Urinalysis
chemical_list: D001786:Blood Glucose; D003404:Creatinine; D006442:Glycated Hemoglobin; D007004:Hypoglycemic Agents; D008055:Lipids; D011719:Pyrazines; D000068900:Sitagliptin Phosphate; D014230:Triazoles
keywords: dipeptidyl peptidase IV inhibitor; oral antidiabetic drugs; sitagliptin; type 2 diabetes mellitus