Reliability and Validity of the Indonesian Version of Overt Agitation Severity Scale (OASS) among Agitated Emergency Psychiatric Patients

Poltak Jeremias Sirait, Bahagia Loebis, Vita Camellia, Ferdinan Leo Sianturi, Grace Wangge, Eva Suarthana, Marzani Manday, Desmond Stirling


The aim of this study was examining the reliability and validity of the Indonesian version of Overt Agitation Severity Scale (OASS) in assessing the severity of agitation. We translated the original OASS to the Indonesian version. Then, we investigated the internal consistency, inter-rater reliability and the validity of the Indonesian version of the OASS. In the validity study, we compared the OASS Indonesian version with PANSS-EC. In the reliability study, Cronbach’s alpha was 0.76; the inter-rater reliability of the OASS Indonesian version showed a Spearman’s rho of 0.711 - 1. In the validation study, the Indonesian version of OASS score correlated with the PANSS-EC scores, Spearman’s rho 0.951. The study indicates that the Indonesian version of OASS is a reliable and valid instrument to test agitation.

Keywords: Agitation, Aggression, Psychiatric Rating Scale


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ISSN (Paper)2224-3208 ISSN (Online)2225-093X

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