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Validation of the Standardised Assessment of Personality

Validation of the standardised assessment of personality – abbreviated scale in a generalpopulation sample (2015)

M. Fok, S. Seegobin, S. Frissa, S. L. Hatch, M. Hotopf, R. D. Hayes and P. Moran

 

Background

Personality disorder (PD) is associated with important health outcomes in the general population.However, the length of diagnostic interviews poses a significant barrier to obtaining large scale,population-based data on PD. A brief screen for the identification of people at high risk of PD in the general populationcould be extremely valuable for both clinicians and researchers. We set out to validate the Standardised Assessment of Personality – Abbreviated Scale (SAPAS), in a general populationsample, using the Structured Clinical Interviews for DSM-IV Personality Disorders (SCID-II) as a gold standard.

How was the study conducted?

One hundred and ten randomly selected, community-dwelling adults were administered the SAPAS screening interview. The SCID-II was subsequently administered by a clinical interviewer blind to the initialSAPAS score. Receiver operating characteristic analysis was used to assess the discriminatory performance ofthe SAPAS, relative to the SCID-II.

What did we find?

Area under the curve for the SAPAS was 0.70 (95% CI=0.60 to 0.80; p<0.001), indicatingmoderate overall discriminatory accuracy. A cut point score of 4 on the SAPAS correctly classified 58% of participants.At this cut point, the sensitivity and specificity were 0.69 and 0.53 respectively.

Conclusions

The SAPAS operates less efficiently as a screen in general population samples and is probablymost usefully applied in clinical populations.

 

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