title: Adherence to treatment for diabetes mellitus: validation of instruments for oral antidiabetics and insulin.
abstract: OBJECTIVE
  to verify the face validity, criterion-related validity and the reliability of two distinct forms of presentation of the instrument Measurement of Adherence to Treatment, one being for ascertaining the adherence to the use of oral antidiabetics and the other for adherence to the use of insulin, as well as to assess differences in adherence between these two modes of drug therapy.
  
  
  METHODS
  a methodological study undertaken with 90 adults with Type 2 Diabetes Mellitus. The criterion-related validity was verified using the Receiver Operating Characteristic curves; and for the reliability, the researchers calculated the Cronbach alpha coefficient, the item-total correlation, and the Pearson correlation coefficient.
  
  
  RESULTS
  the oral antidiabetics and the other showed sensitivity of 0.84, specificity of 0.35 and a Cronbach correlation coefficient of 0.84. For the adherence to the use of insulin, the values found were, respectively, 0.60, 0.21 and 0.68. A statistically significant difference was found between the final scores of the two forms of the instrument, indicating greater adherence to the use of insulin than to oral antidiabetics.
  
  
  CONCLUSIONS
  it is concluded that the two forms of the Measurement of Adherence to Treatment instrument are reliable and should be used to evaluate adherence to drug treatment among people with diabetes mellitus.
authors.affiliation: Universidade de São Paulo, Escola de Enfermagem de Ribeirão Preto, Ribeirão PretoSP, Brazil, Doctoral student, Escola de Enfermagem de Ribeirão Preto, Universidade de São Paulo, WHO Collaborating Centre for Nursing Research Development, Ribeirão Preto, SP, Brazil.
authors.forename: Lilian Cristiane Gomes-Villas
authors.initials: LC
authors.lastname: Boas
authors.affiliation: Instituto Universitário de Lisboa, Departamento de Psicologia Social e das Organizações, Lisboa, Portugal, PhD, Full Professor, Departamento de Psicologia Social e das Organizações, Instituto Universitário de Lisboa, Lisboa, Portugal.
authors.forename: Maria Luisa Soares Almeida Pedroso de
authors.initials: ML
authors.lastname: Lima
authors.affiliation: Universidade de São Paulo, Escola de Enfermagem de Ribeirão Preto, Ribeirão PretoSP, Brazil, PhD, Associate Professor, Escola de Enfermagem de Ribeirão Preto, Universidade de São Paulo, WHO Collaborating Centre for Nursing Research Development, Ribeirão Preto, SP, Brazil.
authors.forename: Ana Emilia
authors.initials: AE
authors.lastname: Pace
mesh_terms: D000284:Administration, Oral; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000188:drug therapy*; D005260:Female; D006801:Humans; D007004:Hypoglycemic Agents / Q000008:administration & dosage*; D007328:Insulin / Q000008:administration & dosage*; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires; D016903:Drug Monitoring
chemical_list: D007004:Hypoglycemic Agents; D007328:Insulin