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Validation of two informant-based screening instruments for personality disorders in a psychiatric outpatient population
Author(s) -
Sara Germans,
G.L. van Heck,
P.P.G. Hodiamont,
Danielle Elshoff,
Habib Kondakci,
Jeroen de Kloet,
C.A.Th. Rijnders
Publication year - 2013
Publication title -
journal of hospital administration
Language(s) - English
Resource type - Journals
eISSN - 1927-7008
pISSN - 1927-6990
DOI - 10.5430/jha.v2n2p133
Subject(s) - personality , gold standard (test) , positive predicative value , population , medicine , personality disorders , clinical psychology , psychiatry , personality assessment inventory , predictive value , psychology , social psychology , environmental health

Purpose: The predictive validity of two informant-based screening instruments for personality disorders (PDs), the Standardized Assessment of Personality (SAP) and a short eight-item version (SAPAS-INF), were studied in 103 Dutch psychiatric outpatients, using the SCID-II as the ‘gold standard’.

Methods: All patients and their informants were interviewed separately and independently by different interviewers who were unaware of the results in the other conditions.

Results: According to the SCID-II, 66 patients had at least one personality disorder (PD). The SAP correctly classified 72% of all participants in the category PD present/absent. The sensitivity and specificity were 69% and 76%, respectively. The positive and negative predictive values were 84% and 58%. The SAPAS-INF, using a cut-off score of 3, correctly classified 70%; the sensitivity and specificity were 76% and 58%, respectively. The positive and the negative predictive values were 77% and 57%.

Conclusion: These results show that the informant-based SAP as well as the shorter informant-based SAPAS-INF are adequate; though rather moderate screening instruments for identifying PD. The SAP and the SAPAS-INF, however, both performed worse than the SAPAS-SR, which is based on the patient’s self-report. Therefore, it is concluded that the SAP or the SAPAS-INF can be used as a satisfactory screening instruments for the presence/absence of PD in those cases where patients themselves are unable to provide the required information.

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