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Abstract
Introduction: A short screening tool for high-risk individuals with personality disorder (PD) is useful both for clinicians and researchers. The aim of this study was to assess the validity and reliability of the Farsi version of the Standardized Assessment of Personality-Abbreviated Scale (SAPAS). Methods: The original English version of the SAPAS questionnaire was translated into Farsi, and then, translated back into English by two professionals. A survey was then conducted using the questionnaire on 150 clients of primary health care centers in Tabriz, Iran. A total of 235 medical students were also studied for the reliability assessment of the questionnaire. The SAPAS was compared to the short form of Minnesota Multiphasic Personality Inventory (MMPI). The data analysis was performed using receiver operating characteristic (ROC) curve technique, operating characteristic for diagnostic efficacy, Cronbachs alpha, and test-retest for reliability evaluation. Results: We found an area under the curve (AUC) of 0.566 [95% confidence intervals (CI): 0.455-0.677]; sensitivity of 0.89 and specificity of 0.26 at the cut-off score of 2 and higher. The total Cronbachs alpha coefficient was 0.38 and Cohen's kappa ranged between 0.5 and 0.8. Conclusion: The current study showed that the Farsi version of the SAPAS was relatively less efficient, in term of validity and reliability, in the screening of PD in the population.
Highlights
We found an area under the curve (AUC) of 0.566 [95% confidence intervals (CI): 0.455-0.677]; sensitivity of 0.89 and specificity of 0.26 at the cut-off score of 2 and higher
The current study showed that the Farsi version of the Standardized Assessment of Personality-Abbreviated Scale (SAPAS) was relatively less efficient, in term of validity and reliability, in the screening of Personality disorders (PD) in the population
It was validated in a small sample of psychiatric patients, where it was found to have good psychometric properties, correctly identifying the presence of PD in 90% of patients, with a sensitivity of 0.94 and specificity of 0.85 at cutoff score of 3.12 its validity and reliability have been evaluate in various fields including patients with substance use disorder (SUD),[19,20] depression,[21] and incarcerated adolescent boys.[22]
Summary
Medical students of Tabriz University of Medical Sciences completed the SAPAS after giving informed consent. AUC values of 0.5-0.7, 0.7-0.9, 0.9-1, respectively, indicate a low, moderate, and high discriminatory ability for the measure.[26] Sensitivity and specificity were calculated. The AUC was 0.556 [confidence intervals (CI): 0.455- 0.677] (Figure 1); this means that a randomly selected individual with PD is 56% more likely to have a higher score of SAPAS than a randomly chosen participant without PD.[27] it possess a low capability range of diagnostic accuracy. Optimal point was calculated by means of Youden's index (Table 1); 2 was the optimal cut-off score, with sensitivity of 0.90, specificity of 0.28, and correct classification of 40% of individuals. Sensitivity, specificity, positive likelihood ratio (LR+), and negative likelihood ratio (LR–) were calculated at 4 cut-off points which are all presented in table 2
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