Psychometric properties of the healthful eating belief scales for persons at risk of diabetes.
OBJECTIVE
To examine the validity and reliability of Theory of Planned Behavior (TPB) scales for healthful eating for persons at risk for diabetes.


METHODS
Cross-sectional, using a self-administered questionnaire.


METHODS
Community in the Midwest.


METHODS
106 adults who self-identified based on one or more American Diabetes Association diabetes risks.


METHODS
Behavioral, normative, and control beliefs; and attitude, subjective norm, perceived behavioral control, and intention to eat a healthful diet.


METHODS
Construct validity was assessed with factor analyses and measurement and structural models using structural equation modeling. Reliability of the scales was assessed with Cronbach alpha and a 2-month test-retest.


RESULTS
Factor analysis loadings were greater than .37. Cronbach alphas for the behavioral, normative, and control belief scales were .80, .91, and .84, respectively. The measurement model revealed that the measures were significant estimates for the TPB constructs, and they fit well as indirect measures of attitude, subjective norm, and perceived behavioral control in predicting intention to eat a healthful diet. Test-retest revealed 2-month stability of the scales.


CONCLUSIONS
Scales for measuring TPB behavioral, normative, and control beliefs were valid and reliable for use with adults at risk for diabetes. Further examination with minority persons is warranted.
Blue
Carolyn L
CL
School of Nursing, The University of North Carolina Greensboro, Greensboro, NC, USA. clblue2@uncg.edu
Marrero
David G
DG
D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology / Q000523:psychology*; D004435:Eating; D005163:Factor Analysis, Statistical; D005260:Female; D005518:Food Preferences / Q000523:psychology*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D008875:Middle Aged; D008960:Models, Psychological; D011593:Psychology, Social; D011594:Psychometrics / Q000379:methods*; D012307:Risk Factors; D011795:Surveys and Questionnaires