I liked the ideas and the methodological setting (i.e., online survey) of this study and I think the reported data have potential.
Wrong column headings in tables: I detected that the authors replaced “GHQ” with “psychological distress” in the text (also “PSS” replaced with “perceived stress”). This is correct. Psychological distress is the latent construct which is measured with the instrument GHQ. Unfortunately, the authors missed to replace GHQ by psychological distress in Table 4 (page 7, line 280) and Table 5 (page 7, line 297; see column headings: not “GHQ”, “Fatigue”, and “Perceived stress” but rather “Psychological distress”, “Fatigue”, and “Perceived stress”). Please correct the two tables.