Anxiety, Depression and Substance Use in Undergraduate Health Science Students During the Covid-19 Pandemic.

Alcohol, Smoking and Substance Involvement Screening Test (ASSIST)

时间窗: 3 months

Validation and cultural adaptation was carried out in university students through a non-experimental ex post facto study with 1,176 undergraduate students, mostly women (70.1%) aged 18 to 23 years (89.5%) and unmarried (87.5%). Concurrent validity was obtained by factor analysis and reliability and correlation tests between the alcohol subscale and AUDIT, the Tobacco subscale and Fargerström's Tes, and the marijuana subscale and the DAST-20. The results found adequate reliability coefficients for the ASSIST subscales for tobacco (alpha = 0.83), alcohol (alpha = 0.76) and marijuana (alpha = 0.73). Regarding interscale correlation, significant correlations were only found with the AUDIT (r = 0.71) and the alcohol subscale.

Patient Health Questionnaire-9 (PHQ-9)

时间窗: 2 weeks

It is a cross-culturally validated instrument and its confirmatory factor analysis suggested that the one-factor structure was a reasonably good fit. The internal consistency of the PHQ-9 was good (Cronbach's alpha\> = 0.8) overall and for subgroups defined by gender, literacy, and age. The PHQ-9 demonstrated good predictive validity: participants with a PHQ-9 diagnosis of depression had lower quality of life scores on the overall WHOQOL-BREF scale and on each of its domains. Using the results of the PHQ-9 as a gold standard, the optimal cut-off score of 10. Definition of the variable: A depressive episode is characterized by a period of depressed mood or decreased interest in activities occurring most of the day, almost every day for a period lasting at least two weeks accompanied by other symptoms such as difficulty concentrating, feelings of worthlessness or excessive or inappropriate guilt.

Generalized Anxiety Disorder scale (GAD-7)

时间窗: 2 weeks

The GAD-7 consists of the 7 items with the highest correlation with the total score of the 13-item scale (r = 0.75-0.85). It is an instrument with cross-cultural validation and analysis of receiver operating characteristics with this set of items showed an area under the curve (0.906) and scales with as much as the full 13-item set. These 7 items also had the highest rank correlations in the development sample (n = 1184) and the 2 replication samples (n = 965 and n = 591). The 2 core criteria (A and B) of the DSM-IV definition of GAD are captured by the first 3 items of the scale.26 Of note, 6 of the 7 items had the highest divergent validity (ie, the largest difference between item-total scale score correlation and item-PHQ-8 depression score correlation \[Δ r = 0.16-0.21\]). Because each of the 7 items is scored from 0 to 3, the GAD-7 scale score ranges from 0 to 21.