Methods

Theoretical study

Systematization of theoretical bases for medical staff’s mental health in the National Institute of Hygiene and Epidemiology during the COVID-19 pandemic, including the definition of mental health and its manifestations, the impact factors that can influence the mental state based on previous research, and press releases from the American Psychology Association (APA) and the World Health Organization (WHO).

Questionnaires measurement

We used questionnaires that were built based on the theoretical about mental health, the effect factors of it, and through referring scales of the mental health’s manifestations to assess mental health status, the ability to control emotions, the ability to deal with challenges and demands, the ability to form and maintain relationships, and interest in work. According to the findings of literature analysis, the Depression, Anxiety, and Stress Scale (DASS) is the most effective scale for assessing the mental health of healthcare workers in other countries affected by pandemics. DASS, on the other hand, meets the criterion for assessing three characteristics that this study focused on. Translate the scales to Vietnamese, organize the items to fit with the purpose of the research, consult experts such as MSc. Tran Thi Hai Yen, has a sample survey of 30 participants to measure the reliability and validity and the survey was qualified to use with With Cronback’s alpha value > 0,7 (0,93), the scale ensures reliability, can be used to measure the research’s goals.
The mental health questionnaire measures some additional demographics information and 3 manifestations including 42 items, each item got 4 answers. The average score was then categorized into 4 groups: Normal mental health status at 0 – 0,75; Suffer mild disorder in their mental health status at 0,75 – 1,5; Suffer moderate disorder in their mental health status at 1,5 – 2,25 and suffer severe disorder in their mental health status at 2,25 - 3. From February 21st to March 7th, 2021, the survey was sent to Hanoi’s National Institute of Hygiene and Epidemiology using Google Form. We had 130 respondents who were given questionnaires, 117 of whom returned completely filled out and analyzable, giving us a response rate of 90% (n=117), the demographic information be performed in Table 1.

Using scale

The PSQI assesses several distinct elements of sleep by utilizing a modified Pittsburgh Sleep Quality Index (PSQI) developed by Bach Mai Hospital in Hanoi, which consists of 19 items and offers seven component scores and one composite score. Each item is rated on a 0–3 scale. The sum of the seven component scores generates the global PSQI score, which ranges from 0 to 21, with lower values indicating better sleep quality and higher values indicating a sleeping problem.

Statistics analyze

We used the Statistical Package for the Social Sciences (SPSS, version 27.0) software to analyze the data. The frequency distribution was used to describe qualitative factors, whereas the mean and standard deviation were used to explain quantitative ones. Also to see the correlations between the mental health status and the other factors that can affect it.