Psychometric properties of the general anxiety disorders-7 scale using categorical data methods: A study in a sample of university attending ethiopian young adults

Md Dilshad Manzar, Ahmad H. Alghadir, Shahnawaz Anwer, Mazen Alqahtani, Mohammed Salahuddin, Habtamu Acho Addo, Wakuma Wakene Jifar, Nofaa Ali Alasmee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Background: Few studies have investigated the psychometric validation of the General Anxiety Disorders-7 Scale (GAD-7) using appropriate data assumptions. This study examined the reliability, factorial validity, divergent validity, and item analysis of the GAD-7 using categorical data methods in a sample of Ethiopian young adults. Methods: A sample of 270 students in the age group (18–20 years) was recruited during February-May of 2017 in this cross-sectional study using simple random sampling. The participants completed a tool for socio-demographic details, the GAD-7, and the Perceived Stress Scale-10 (PSS-10). Results: The cumulative variance rule (> 40%), the scree test, Kaiser’s criteria (Eigenvalues > 1), and the parallel analysis found a 1-factor model for the GAD-7 (factor loadings, 0.38 to 0.63). Fit indices suggested a 1-factor model: The tests applied included the weighted root mean square residual (0.030), comparative fit index (1.000), the goodness of fit index (1.00), root mean square error of approximation (0.037) and the non-normed fit index (1.00). McDonald’s Omega (0.772) implied that the scores had adequate internal consistency. Divergent validity was supported by significant but weak correlations that were found between the GAD-7 and PSS-10 scores (r = 0.11 to 0.25, p<0.05). Conclusion: The psychometric validity of the GAD-7 in Ethiopian university attending young adults was supported by the categorical data method.

Original languageEnglish
Pages (from-to)893-903
Number of pages11
JournalNeuropsychiatric Disease and Treatment
Volume17
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Africa
  • Anxiety
  • Factor analysis
  • McDonald’s omega
  • Stress

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry

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