<p>Development and psychometric evaluation of the Treatment Adherence Questionnaire for Patients with Combat Post-traumatic Stress Disorder</p>

Abstract

PurposeTreatment adherence is one of the major strategies in treating post-traumatic stress disorder (PTSD) in combat veterans. This study developed and psychometrically assessed the Treatment Adherence Questionnaire for Patients with Combat Post-Traumatic Stress Disorder.Participants and methodsThis methodological study was conducted in Tehran, Iran, during 2016–2017 in two phases. First, the concept of treatment adherence in combatants with PTSD was analyzed using a hybrid model. This model consisted of three phases: literature review phase, fieldwork phase, and final analysis phase. The consequences and attributes of the concept of treatment adherence in combatants with PTSD were identified, and based on the findings, the Treatment Adherence Questionnaire for PTSD veterans was developed. In the second stage, the face and content validities of the questionnaire were investigated both quantitatively and qualitatively. Exploratory factor analysis and confirmatory factor analysis were used to determine the questionnaire’s validity. Internal consistency correlation coefficient of the questionnaire was estimated with Cronbach’s alpha coefficient, while the reliability of the questionnaire was established using intra-class test-retest correlation coefficient. Study participants were selected from inpatients and outpatients referred to a hospital, clinic, and health center in Tehran and Kashan, Iran. All patients were diagnosed with combat PTSD by a psychiatrist, based on psychiatric interview and other clinical findings.ResultsThe Persian version of the Treatment Adherence Questionnaire for Patients with Combat Post-Traumatic Stress Disorder included 17 items. Exploratory factor analysis identified three factors which accounted for a total of 87.57% of the total variance of treatment adherence score. The identified factors were labeled as “maintenance of treatment”, “follow-up and treatment contribution”, and “purposefulness and responsibility”. The Cronbach’s alpha correlation coefficient was 0.92 and the intra-class correlation coefficient of the questionnaire’s reliability was estimated at 0.92 (P<0.001).ConclusionThe data obtained confirmed the hypothesis of the factor structure model with a latent second-order variable. The final version of the Treatment Adherence Questionnaire for Iranian combatants with PTSD can be applied as a valid and reliable questionnaire for measuring treatment adherence in these patients.

Translation and psychometric properties of the Persian version of the Health of the Nation Outcome Scales for Elderly People (HoNOS65+)

“…One of the factors related to judging the structure validity is the analysis of variance through the factors identified by the EFA. The EFA factor's variance of above 50% is acceptable 37 . In the Dutch version of this scale, the variance measured 60.3%, 32 similar to our study, where the calculated variance is 62.8%, also an acceptable range.…”

“…The EFA factor's variance of above 50% is acceptable. 37 In the Dutch version of this scale, the variance measured 60.3%, 32 similar to our study, where the calculated variance is 62.8%, also an acceptable range. Based on the EFA results, three sub-scores have been found…”

<p>Psychometric Properties of a Questionnaire on Brucellosis Prevention Behaviors Based on the PRECEDE Model Among Rural Farmers and Their Family Members</p>

“…In the first phase of this study (qualitative phase), an 86-item tool was designed through expert panel (face and content validity) and reduced to 36 items with confirmatory factor analysis. In the study of Ahmadzadeh et.al, 34 56 items were designed and only 26 items were selected by expert opinions. Finally, the number of items reduced to 17 by factor analysis.…”

Development and validation of the Iranian version of the Patient Privacy and Confidentiality Scale

“…Hence, the scale developed in this study enjoys suitable reliability (21) (37). The correlation coefficient between scores of the test and retest examines the consistency and repeatability of a test (21,38). Given the correlation coefficients obtained in this study, it may be asserted that the instrument enjoys appropriate consistency and repeatability and is, therefore, suitably reliable.…”