Table 1.

Main dataset characteristics.

Countries	7
Regions of analysis	114
Period	1 August 2020–9 January 2021*
Days across all regions	19,000
NPI entries in the dataset	>5500**
Data validation (manual)	Semi-independent double entry***; interviews with local epidemiologists; validation against external sources; cross-country consistency checks

In total, we collated >5500 intervention entries through a systematic categorisation.

*We ended the period of analysis before 9 January 2021 for English regions depending on their prevalence of a new variant of concern (see “Methods”). **Each entry includes the NPI start date and end date, quotes and comments, and one or more sources from websites of governments and universities, legal documents and/or media reports. ***Data were entered twice by two different groups of researchers. In the second round of data entry, researchers had access to the sources, quotes and comments found in the first round, but not to the NPI data entered in the first round (see Methods).