Rulman Andrei Franco Jimenez, Amanda Nuñez Magallanes
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.
The psychometric properties of the General Anxiety Disorder-7 (GAD-7) and its ultra-short versions, the GAD-2 and the GAD-Mini, were evaluated in a sample of 407 students from two Peruvian universities (259 females and 148 males). First, a structural analysis was performed using the CFA, showing a good fit with respect to the instrument's unifactorial model χ²(14) = 31.717, CFI = .995, TLI = .992, RMSEA = .056, SRMR = .026. In addition, a measurement invariance analysis was performed, finding a stable unifactorial structure considering sex. Furthermore, evidence of convergent validity was analyzed in the GAD-7 and its ultra-short versions, presenting moderate correlations with instruments such as the PHQ-2 and the AAQ-II. The internal consistency of the instruments was evaluated using the omega coefficient and obtained high values of .89, .80, and .79 in the GAD-7, GAD-2, and GAD-Mini respectively. Therefore, it is concluded that the GAD-7 is a unifactorial instrument, invariant according to sex, with adequate internal consistency and convergent validity as well as its ultra-short versions in the sample studied.