Dutch Translation and Validation of the Treatment Expectation Questionnaire (TEX-Q)

Area of Science:

• Psychometric validation
• Cross-cultural adaptation
• Healthcare research

Background:

• The Treatment Expectation Questionnaire (TEX-Q) assesses patient expectations for medical and psychological treatments.
• Currently, the TEX-Q is available only in English and German.
• There is a need for a validated Dutch version of the TEX-Q.

Purpose of the Study:

• To translate the TEX-Q into Dutch.
• To evaluate the psychometric properties of the Dutch TEX-Q.
• To establish a reliable instrument for assessing patient treatment expectations in the Netherlands.

Main Methods:

• Cross-cultural adaptation of the TEX-Q following international guidelines.
• Validation in 163 gynaecological outpatients and test-retest reliability in 25 patients.
• Analysis included data completeness, internal consistency (Cronbach's α), construct validity, confirmatory factor analysis (CFA), and convergent/discriminant validity using established questionnaires.

Main Results:

• The Dutch TEX-Q showed good internal consistency (Cronbach's α > 0.75 for most subscales) and acceptable test-retest reliability (ICC = 0.72).
• Confirmatory factor analysis supported a six-factor model with high factor loadings.
• Convergent validity was supported by moderate to strong correlations with CEQ and B-IPQ, while discriminant validity was supported by low correlations with LOT-R, GSES, GAD-7, and PHQ-9.

Conclusions:

• The Dutch version of the TEX-Q is a valid and reliable instrument for measuring patient treatment expectations.
• The validated Dutch TEX-Q is suitable for research and clinical practice, particularly in gynaecology.
• Further validation across diverse clinical populations is recommended to broaden its applicability.