Abstract
Objectives. To develop Patient and Partner versions of a psychometrically sound questionnaire,
the EDITS (Erectile Dysfunction Inventory of Treatment Satisfaction), to assess satisfaction
with medical treatments for erectile dysfunction.
Methods. Treatment satisfaction differs from treatment efficacy as it focuses on a
person’s subjective evaluation of treatment received. Twenty-nine items representing
the domain of treatment satisfaction for men and 20 representing partner satisfaction
were generated. Two independent samples of 28 and 29 couples completed all items at
two points in time. Spearman rank-order correlations were derived to assess test-retest
reliability and couple coefficients of validity. Internal consistency coefficients
were calculated for both Patient and Partner versions and a content validity panel
was used to analyze content validity.
Results. Only items that met all the following criteria were selected to comprise
the final questionnaires: (a) range of response four or more out of five; (b) test-retest
reliability greater than 0.70; (c) ratings by at least 70% of the content validity
panel as belonging in and being important for the domain; and (d) significant correlation between the subjects’
and partners’ responses. Eleven patient items met criteria and formed the Patient
EDITS; five partner items met criteria and formed the Partner EDITS. Scores on the
two inventories were normally distributed with internal consistencies of 0.90 and
0.76, respectively. Test-retest reliability for the Patient EDITS was 0.98; for the
Partner EDITS, it was 0.83.
Conclusions. Reliability and validity were well established, enabling the EDITSs to
be used to assess satisfaction with treatment modalities for erectile dysfunction
and to explore the impact of patient and partner satisfaction on treatment continuation.
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Article info
Publication history
Accepted:
October 9,
1998
Received in revised form:
October 9,
1998
Received:
August 4,
1998
Footnotes
☆This research was supported by Pfizer, Inc., New York, New York.
Identification
Copyright
© 1999 Elsevier Science Inc. Published by Elsevier Inc. All rights reserved.
