TY - JOUR

T1 - Development and testing of the insulin treatment experience questionnaire (ITEQ)

AU - Moock, Jörn

AU - Ziegeler, Diana

AU - Kohlmann, Thomas

AU - Hessel, Franz

AU - Kubiak, Thomas

N1 - Copyright 2010 Elsevier B.V., All rights reserved.

PY - 2010/3/1

Y1 - 2010/3/1

N2 - Objectives: To develop and psychometrically evaluate a domain-specific questionnaire to assess subtle but clinically relevant differences in treatment experiences and satisfaction over a wide range of currently available insulin therapy regimens. The study focussed on patients with type 2 diabetes mellitus and placed particular attention on the impact of different forms of insulin therapy on diabetes self-management. Methods: The development of the Insulin Treatment Experience Questionnaire (ITEQ) was conducted in three steps: (i) a qualitative phase to generate relevant items and identify relevant domains; (ii) a pilot study to reduce the number of generated items; and (iii) a validation study to assess major psychometric properties of the final ITEQ version. Results: The final version of the questionnaire comprised 28 items with the subscales ?leisure activities? (four items), ?psychological barriers? (two items), ?handling? (five items), ?diabetes control? (six items), ?dependence? (five items), ?weight control? (three items), ?sleep? (two items), and one further item assessing general treatment satisfaction. The subscales? internal consistencies (Cronbach?s alpha) ranged from 0.52 to 0.83. Motivated by the homogenous structure of inter-scale-correlations (range 0.10?0.46), a summary composite score was calculated (alpha = 0.86). Construct validity showed statistically significant correlations with other scales (ITEQ vs the Problem Areas in Diabetes [PAID] questionnaire total score -0.60, ITEQ vs the Diabetes Treatment Satisfaction Questionnaire [DTSQ] total score 0.52). Conclusion: The newly developed ITEQ displayed satisfactory to good psychometric properties, thereby allowing the assessment of everyday life experience and treatment satisfaction in patients with insulin-treated type 2 diabetes. Additional research is needed to assess test-retest reliability and sensitivity to change.

AB - Objectives: To develop and psychometrically evaluate a domain-specific questionnaire to assess subtle but clinically relevant differences in treatment experiences and satisfaction over a wide range of currently available insulin therapy regimens. The study focussed on patients with type 2 diabetes mellitus and placed particular attention on the impact of different forms of insulin therapy on diabetes self-management. Methods: The development of the Insulin Treatment Experience Questionnaire (ITEQ) was conducted in three steps: (i) a qualitative phase to generate relevant items and identify relevant domains; (ii) a pilot study to reduce the number of generated items; and (iii) a validation study to assess major psychometric properties of the final ITEQ version. Results: The final version of the questionnaire comprised 28 items with the subscales ?leisure activities? (four items), ?psychological barriers? (two items), ?handling? (five items), ?diabetes control? (six items), ?dependence? (five items), ?weight control? (three items), ?sleep? (two items), and one further item assessing general treatment satisfaction. The subscales? internal consistencies (Cronbach?s alpha) ranged from 0.52 to 0.83. Motivated by the homogenous structure of inter-scale-correlations (range 0.10?0.46), a summary composite score was calculated (alpha = 0.86). Construct validity showed statistically significant correlations with other scales (ITEQ vs the Problem Areas in Diabetes [PAID] questionnaire total score -0.60, ITEQ vs the Diabetes Treatment Satisfaction Questionnaire [DTSQ] total score 0.52). Conclusion: The newly developed ITEQ displayed satisfactory to good psychometric properties, thereby allowing the assessment of everyday life experience and treatment satisfaction in patients with insulin-treated type 2 diabetes. Additional research is needed to assess test-retest reliability and sensitivity to change.

KW - Health sciences

KW - Insulin Therapy

KW - Treatment Satisfaction

KW - Cognitive Debriefing

KW - Psychological Barrier

KW - Diabetes Treatment Satisfaction Questionnaire

UR - http://www.scopus.com/inward/record.url?scp=77953429270&partnerID=8YFLogxK

U2 - 10.2165/11319510-000000000-00000

DO - 10.2165/11319510-000000000-00000

M3 - Journal articles

AN - SCOPUS:77953429270

VL - 3

SP - 45

EP - 58

JO - Patient

JF - Patient

SN - 1178-1653

IS - 1

ER -