*2.2. Questionnaires*

#### 2.2.1. Perceived Social Support

We estimated the levels of satisfaction with perceived social support using three questions: "In the past week, did you receive satisfactory support from your (1) family, (2) friends, and (3) colleagues or classmates?" The responses were graded on a five-point Likert scale, with scores ranging from 0 (entirely disappointed) to 4 (extremely satisfied). Higher total scores indicated more satisfaction with their level of perceived social support during the COVID-19 pandemic. This instrument is reliable and well-validated according to the supplementary material of previous publication [24].
