Effect of nations' COVID restrictions on mental health varied by type, group

An international team led by a Simon Fraser University researcher in Canada assessed the stringency of daily public health policies using the Oxford COVID-19 Government Response Tracker and psychological distress and life evaluations using the Imperial College London-YouGov COVID 19 Behaviour Tracker Global Survey. Respondents from 15 countries were tracked from Apr 27, 2020, to Jun 28, 2021, when most participants weren't fully vaccinated. They completed the four-item Patient Health Questionnaire (PHQ-4) and the single-question Cantril Ladder every 2 weeks. Included countries were Australia, Canada, Denmark, Finland, France, Germany, Italy, Japan, the Netherlands, Norway, Singapore, South Korea, Spain, Sweden, and the United Kingdom. The researchers also studied a subset of the Nordic countries, with Sweden following a mitigation strategy, and Denmark, Finland, and Norway adopting an elimination approach. Australia, Japan, Singapore, and South Korea pursued a COVID-elimination strategy, while the remainder took a mitigation approach.