Psychometric assessment and development of a shorter version of a new anxiety scale in a hospital sample from Lima, Peru

Authors

  • Antonio Lozano-Vargas Servicio de Neuropsiquiatría, Hospital Nacional Cayetano Heredia. Lima, Perú. Sección de Psiquiatría y Salud Mental, Universidad Peruana Cayetano Heredia. Lima, Perú. Médico psiquiatra.
  • Johann Vega-Dienstmaier Servicio de Neuropsiquiatría, Hospital Nacional Cayetano Heredia. Lima, Perú. Sección de Psiquiatría y Salud Mental, Universidad Peruana Cayetano Heredia. Lima, Perú. Médico psiquiatra.

DOI:

https://doi.org/10.17843/rpmesp.2013.302.193

Keywords:

Psychometrics, Anxiety, Validation studies, Peru

Abstract

Objectives.To assess psychometric properties and to develop a shorter version of a new anxiety scale. Materials and methods: The 130-item new anxiety scale (NAS-130) was administered to 254 psychiatric outpatients of a general hospital in Lima, Peru. A categorical principal component analysis (CATPCA) was performed with the 130 items and based on these results and the relation of each item with a Clinical Global Impressions Severity Scale for anxiety (CGI-S) the scale was simplified. In addition, the CGI-S was used to assess the concurrent validity of the scale. Results. The NAS-130 had a Cronbach’s alpha of 0.97 and a Spearman correlation coefficient (Rho) with CGI-S of 0.44 (p<0.01). After item selection, a 72-item scale was obtained (NAS-72) which had a Cronbach’s alpha of 0.96 and a Rho with CGI-S of 0.47 (p<0.01). All items of NAS-72 had saturation coefficients greater than 0.4 in one dimension according to the CATPCA. NAS-130 and NAS-72 scores were significantly higher in women than in men (p<0.01). Conclusions. The NAS-72 has psychometric characteristics that suggest that it could be useful to measure anxiety in our population; however, the scores should be interpreted differently in men and women.

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Published

2014-02-10

Issue

Section

Research Articles

How to Cite

1.
Lozano-Vargas A, Vega-Dienstmaier J. Psychometric assessment and development of a shorter version of a new anxiety scale in a hospital sample from Lima, Peru. Rev Peru Med Exp Salud Publica [Internet]. 2014 Feb. 10 [cited 2024 Mar. 28];30(2). Available from: https://rpmesp.ins.gob.pe/index.php/rpmesp/article/view/193

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