Revista de Salud Pública
Print version ISSN 0124-0064
CALVO-GOMEZ, JoséManuel; SANCHEZ-PEDRAZA, Ricardo; JARAMILLO-GONZALEZ, Luis Eduardo and TARCISIO-MANTILLA, Carlos. Validating the Simpson-Angus extra-pyramidal collateral symptom evaluation scale. Rev. salud pública [online]. 2006, vol.8, n.1, pp. 74-87. ISSN 0124-0064. http://dx.doi.org/10.1590/S0124-00642006000100007.
Objectives The study was aimed at validating the Simpson-Angus scale for neuroleptic-induced extrapyramidal syndrome in Colombia, using a Spanish version of the scale. Methods The scale was validated in four steps: translating the scale, pilot study, preliminary use for factorial analysis and analysis of validity, reliability and sensitivity to change. Results Factorial structure and internal consistency were evaluated in 86 psychiatric inpatients. Test-retest and inter-rater reliability were evaluated in a 15-patient subgroup. Concurrent validity was analysed by simultaneously applying Simpson-Angus and Chouinard scales. Sensitivity to change was evaluated by comparing the scores of two different clinical points in a 20-patient subgroup. Main factor analysis revealed that the scale has a one-dimensional structure; the Glabella tap did not contribute towards total variability of the condition measured for the scale. Test-retest and inter-rater reliability values, concurrent validity and sensitivity to change were good. Correlation estimation scores were above 0.8 and accuracy levels were also good. Conclusions The Spanish version of the SA scale, adapted for this study, is suitable for assessing neuroleptic-induced extrapyramidal syndrome; it would be a useful instrument in both clinical practice and research settings in Colombia. However, an important limitation could be its lack of detecting any domain different to that of rigidity.
Keywords : secondary Parkinsonâs Disease; psychiatric status rating scale; antipsychotic agent; validation study; comparative study; neurological examination.