title: Treatment of patients over 64 years of age with type 2 diabetes: experience from nateglinide pooled database retrospective analysis.
abstract: OBJECTIVE
  To evaluate the impact of renal impairment (RI) (estimated creatinine clearance [Cl(cr)] <60 ml/min per 1.73 m(2)) and low baseline HbA(1c) (<7.5%) on comorbidity in patients with type 2 diabetes, and to assess the efficacy and safety of nateglinide monotherapy in these patients and in subgroups of patients over age 64 years (elderly) and elderly with RI.
  
  
  METHODS
  Retrospective subgroup analyses were performed on pooled data from all completed nateglinide studies (12 randomized, double blind trials and 1 open trial) in patients with type 2 diabetes. A total of 3,702 patients with > or =1 postbaseline safety evaluation received monotherapy with nateglinide (n = 2,204), metformin (n = 436), glyburide (n = 293), or placebo (n = 769). Efficacy (HbA(1c)) was evaluated in pooled data from four studies with similar design using 120 mg nateglinide (n = 544) versus placebo (n = 521). Evaluations were performed in the overall population and subgroups of patients over age 64 years. Specific considerations were given to RI, comorbidity, and baseline HbA(1c).
  
  
  RESULTS
  Patients over age 64 years (n = 1,170) represented 31.6% of the study population. Undiagnosed RI was common in the elderly with 83.4% of all patients being in this subgroup. Patients over 64 years with RI had a higher prevalence of cardio- and microvascular comorbidity compared with the overall population and all patients over age 64 years. Statistically significant HbA(1c) reductions versus placebo were observed with nateglinide in patients over age 64 years and elderly with RI patients at study end point (-0.9% and -1.1% in each subgroup, P < 0.01). Nateglinide was well tolerated with a low incidence of hypoglycemia in all subgroups, including those with RI and low baseline HbA(1c).
  
  
  CONCLUSIONS
  RI and comorbidity are common in patients over age 64 years with type 2 diabetes. Nateglinide was effective and well tolerated in all treated patients. In subgroups in which metformin and long-acting sulfonylureas must be used with caution, nateglinide had a low risk of adverse events and hypoglycemia.
authors.affiliation: Department of Endocrinology and Metabolism, Section of Diabetes, University of Pisa, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Del Prato
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Heine
authors.forename: Leonard
authors.initials: L
authors.lastname: Keilson
authors.forename: Christiane
authors.initials: C
authors.lastname: Guitard
authors.forename: Sharon G
authors.initials: SG
authors.lastname: Shen
authors.forename: Rebecca P
authors.initials: RP
authors.lastname: Emmons
mesh_terms: D000368:Aged; D001786:Blood Glucose / Q000187:drug effects / Q000378:metabolism; D015992:Body Mass Index; D015897:Comorbidity; D003510:Cyclohexanes / Q000627:therapeutic use*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000188:drug therapy*; D003925:Diabetic Angiopathies / Q000453:epidemiology; D005905:Glyburide / Q000627:therapeutic use; D006442:Glycated Hemoglobin / Q000378:metabolism; D006801:Humans; D007004:Hypoglycemic Agents / Q000627:therapeutic use*; D008687:Metformin / Q000627:therapeutic use; D000077715:Nateglinide; D010649:Phenylalanine / Q000031:analogs & derivatives / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic; D012189:Retrospective Studies
chemical_list: D001786:Blood Glucose; D003510:Cyclohexanes; D005905:Glyburide; D006442:Glycated Hemoglobin; D007004:Hypoglycemic Agents; D008687:Metformin; D000077715:Nateglinide; D010649:Phenylalanine