We have looked closely at the article on factors of psychological status of primary medical staff during the COVID-19 outbreak. In bivariate-analysis, marriage was correlated with all mental health measures (SAS, DAS and MQSPHE), age was correlated with MQSPHE, education was correlated with one aspect of MQSPHE, namely hypochondriasis, while gender was not correlated with mental health. However, at multivariate-analysis, only marriage was proven to be a factor of mental health. 1 Then the questions arise: 1) Is it true that age, education and gender are not factors of mental health? 2) Could it be that these three are indirect factors of mental health?In multivariate-analysis, the authors used logistic-regression test to prove simultaneous effect of the four factors, and only marriage was proven as a factor of mental health; whereas in the previous stage (bivariate-analysis), the authors have proven that age and education were also correlated with mental health. This indicates that age and education are actually a factor of mental health, although only as an indirect factor. Thus, it is necessary to carry out further analysis to prove whether age, education and gender are indirect factors of mental health. In this case, the appropriate method to use is path-analysis, 2 for example using the following alternative pathways:1. Age→ marriage→ mental health. 2. Education→ marriage→ mental health. 3. Gender→ marriage→ mental health.For example, it is assumed that age affects marriage, then marriage affects mental health, as well as for other paths; and the authors can modify it.Based on the paths, and referring to similar problems, 3,4 we suggest that the authors carry out further analysis using path-analysis with Smart-PLS program because all independent variables are categorical data. 2 This method is expected to prove the status of age, education and gender as indirect factors of mental health of medical staff during the COVID-19 outbreak.