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. 2020 Dec 12;10(12):e043805. doi: 10.1136/bmjopen-2020-043805

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Patterns of stress changes across time. Average changes in score on the Cohen’s Perceived Stress Scale (PSS) from pre-outbreak to during the outbreak (ie, current PSS minus pre-outbreak PSS; higher scores indicating stress worsening) measured cross-sectionally across each time period of survey completion (each comprising 7 days starting on the date of the survey launch). Higher change scores reflect higher stress worsening relative to pre-outbreak stress levels. Error bars indicate the SE of the mean. Sample sizes for each 7 day time period are as follows: April 3rd: n=516, April 10th: n=135, April 17th: n=453, April 24th: n=1035, May 1st: n=936, May 8th: n=2028. **p<0.001.