Measuring Diabetes Self-Care

A psychometric analysis of the Self-Care Inventory-revised with adults

  1. Katie Weinger, EDD, RN12,
  2. Heather A. Butler, PHD, RN1,
  3. Garry W. Welch, PHD3 and
  4. Annette M. La Greca, PHD4
  1. 1Behavioral and Mental Health Research, Joslin Diabetes Center, Boston, Massachusetts
  2. 2Harvard Medical School, Boston, Massachusetts
  3. 3Behavioral Medicine Research, Bay State Medical Center, Springfield, Massachusetts
  4. 4Department of Psychology, University of Miami, Coral Gables, Florida
  1. Address correspondence and reprint requests to Katie Weinger, EdD, RN, Section on Behavior and Mental Health Research, Joslin Diabetes Center, 1 Joslin Place, Boston, MA 02115. E-mail: katie.weinger{at}


OBJECTIVE—To examine psychometric properties of the Self-Care Inventory-revised (SCI-R), a self-report measure of perceived adherence to diabetes self-care recommendations, among adults with diabetes.

RESEARCH DESIGN AND METHODS—We used three data sets of adult type 1 and type 2 diabetic patients to examine psychometric properties of the SCI-R. Principal component and factor analyses examined whether a general factor or common factors were present. Associations with measures of theoretically related concepts were examined to assess SCI-R concurrent and convergent validity. Internal reliability coefficients were calculated. Responsiveness was assessed using paired t tests, effect size, and Guyatt’s statistic for type 1 patients who completed psychoeducation.

RESULTS—Principal component and factor analyses identified a general factor but no consistent common factors. Internal consistency of the SCI-R was α = 0.87. Correlation with a measure of frequency of diabetes self-care behaviors was r = 0.63, providing evidence for SCI-R concurrent validity. The SCI-R correlated with diabetes-related distress (r = −0.36), self-esteem (r = 0.25), self-efficacy (r = 0.47), depression (r = −0.22), anxiety (r = −0.24), and HbA1c (r = −0.37), supporting construct validity. Responsiveness analyses showed SCI-R scores improved with diabetes psychoeducation with a medium effect size of 0.62 and a Guyatt’s statistic of 0.85.

CONCLUSIONS—The SCI-R is a brief, psychometrically sound measure of perceptions of adherence to recommended diabetes self-care behaviors of adults with type 1 or type 2 diabetes.


  • The Self-Care Inventory (SCI) is copyrighted. To request permission to use the SCI, contact A.M.L.G. E-mail: alagreca{at}

    A table elsewhere in this issue shows conventional and Système International (SI) units and conversion factors for many substances.

    • Accepted February 20, 2005.
    • Received June 11, 2004.
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