Propiedades psicométricas del GAD-7, GAD-2 y GAD-Mini en universitarios peruanos

Abstract

Se evaluó las propiedades psicométricas del General Anxiety Disorder-7 (GAD-7) y la de sus versiones ultracortas el GAD-2 y el GAD-Mini en una muestra conformada por 407 estudiantes de dos universidades peruanas (259 mujeres y 148 varones). Inicialmente se realizó el análisis estructural mediante el AFC mostrándose un buen ajuste respecto al modelo unifactorial del instrumento χ²(14) = 31.717, CFI = .995, TLI = .992, RMSEA = .056, SRMR = .026. Adicionalmente se efectuó un análisis de invarianza de la medición encontrándose una estructura unifactorial estable considerando el sexo. Además, se analizaron evidencias de validez convergente en el GAD-7 y sus versiones ultracortas presentando correlaciones moderadas con instrumentos como el PHQ-2 y el AAQ-II. La consistencia interna de los instrumentos fue evaluada mediante el coeficiente omega y obtuvieron valores altos de .89, .80 y .79 en el GAD-7, GAD-2 y GAD-Mini respectivamente. Por ello, se concluye que el GAD-7 es un instrumento unifactorial, invariante de acuerdo con el sexo, presenta adecuada consistencia interna y validez convergente al igual que sus versiones ultracortas en la muestra estudiada.

Psychometric properties of the GAD-7 (General Anxiety Disorder-7): a cross-sectional study of the Peruvian general population

“…Our study revealed that the GAD-7 score has one factor. This finding is consistent with results reported in previous studies [ 21 , 23 , 51 ]. Other studies have suggested two-factor or higher-order models, but these results are not necessarily contradictory because these highly related dimensions are part of the same overall construct, anxiety symptoms [ 27 ].…”

“…Likewise, another study reported invariance regarding sex, strata, and linguistic background in a sample of patients after traumatic brain injury [ 23 ]. A study that included a Peruvian sample also reported invariance of the GAD-7 score and other short versions across sexes; however, only university students were considered [ 51 ]. The interpretation of our results suggests that, for the different groups, participants perceive the existence of a single factor consisting of seven items (configural invariance), indicating that the items have equivalent factor loadings, and therefore the items contribute equally to the construct (metric invariance).…”

Depression, anxiety, and stress in medical students in Peru: a cross-sectional study

“…In relation to the limitations of the study, first, the cross-sectional design of the study did not allow us to identify causal relationships between the study variables, but as a strength, in our study we used validated instruments on anxiety ( 99 ), depression ( 100 ) and stress ( 101 ). Also, another limitation found in the study we formulated structured questions for the evaluation of sleep quality, physical activity, substance use, and burnout syndrome.…”

Associations between social network addiction, anxiety symptoms, and risk of metabolic syndrome in Peruvian adolescents—a cross-sectional study

“…Total scores range from 0 to 6 ( 28 , 30 , 31 ). In this study, the version adapted and validated for the Peruvian population was used and presented an adequate Cronbach’s α coefficient (α = 0.81) ( 32 ).…”