Development and validation of a questionnaire for assessing the characteristics of diet and physical activity in patients with type 2 diabetes

Psicothema. 2018 Feb;30(1):116-122. doi: 10.7334/psicothema2017.269.


Background: The aim ofthis study was to explore the psychometric properties of the Motiva.Diaf-DM2 questionnaire, which assesses adherence to a healthy diet and physical activity in patients with Type 2 Diabetes (T2D).

Method: Participants were 206 patients who attended primary care services, with a mean age of 69.63 years (SD = 11.05), with 39.3% of the participants being women. To assess the test-retest reliability of the measure, a random subsample (n = 40) of patients who had another appointment scheduled was selected to fill in the questionnaire once again two weeks after the initial administration.

Results: The reliability of the scores was found to be appropriate both in terms of internal consistency (α first factor = .756; α second factor = .821) and temporal stability (r first factor = .604; r second factor = .638). The structure of the test is two-dimensional. The scores for the second dimension (adherence to physical activity) are in agreement with the scores for basic psychological needs (r physical activity = .281), resilience (r = .216), and glycated haemoglobin (r = -.182).

Conclusions: The Motiva.Diaf-DM2 test was shown to have the appropriate relia-bility and validity to assess adherence to a healthy diet and physical activity in patients diagnosed with T2D.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Attitude to Health*
  • Diabetes Mellitus, Type 2 / diet therapy
  • Diabetes Mellitus, Type 2 / psychology*
  • Diabetes Mellitus, Type 2 / therapy
  • Diet*
  • Diet, Diabetic
  • Diet, Healthy
  • Exercise*
  • Female
  • Health Behavior*
  • Humans
  • Life Style
  • Male
  • Middle Aged
  • Motivation
  • Patient Compliance*
  • Personal Autonomy
  • Psychometrics
  • Reproducibility of Results
  • Surveys and Questionnaires*