Fig. 1

Composite scores of the impact of the COVID-19 on mental health and the perceived work burden in nurses during the COVID-19 pandemic in Slovakia by type of health care provider. * Composite score calculated as a mean of scores of four indicators of mental health impact: nervousness or irritation, inability to solve problems, being depressed or down, no interest in doing things, inability to stop worrying, inability to stay focused, and lack of motivation; each item scored on a scale from 0–3 (3 = almost every day, 0 = not at all). **Composite score calculated as a mean of scores of four indicators of work burden: feeling time pressured, feeling the burden of responsibility, feeling nervous or irritated, wanting to do something else, or feeling fatigue after a few hours of work; each item scored on a scale from 1–4 (5 = fully agree, 1 = fully disagree)