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Table 1 Intervention strictness coding (adapted from [3])

From: The relative effects of non-pharmaceutical interventions on wave one Covid-19 mortality: natural experiment in 130 countries

Indicator Strictness Coding
School closing 0 - No measures
1 - Recommend closing
2 - Require closing (only some levels or categories, eg just high school, or just public schools)
3 - Require closing all levels
Workplace closing 0 - No measures
1 - Recommend closing (or work from home)
2 - Require closing (or work from home) for some sectors or categories of workers
3 - Require closing (or work from home) all-but-essential workplaces (e.g. grocery stores, doctors)
Cancelled public events 0 - No measures
1 - Recommend cancelling
2 - Require cancelling
Restrictions on gatherings 0 - No restrictions
1 - Restrictions on very large gatherings (the limit is above 1000 people)
2 - Restrictions on gatherings between 100 and 1000 people
3 - Restrictions on gatherings between 10 and 100 people
4 - Restrictions on gatherings of less than 10 people
Closing public transport 0 - No measures
1 - Recommend closing (or significantly reduce volume/route/means of transport available)
2 - Require closing (or prohibit most citizens from using it)
Stay at home requirements 0 - No measures
1 - Recommend not leaving house
2 - Require not leaving house with exceptions for daily exercise, grocery shopping, and ‘essential’ trips
3 - Require not leaving house with minimal exceptions (e.g. allowed to leave only once every few days, or only one person can leave at a time, etc.)
Restrictions on internal movement 0 - No measures
1 - Recommend closing (or significantly reduce volume/route/means of transport)
2 - Require closing (or prohibit most people from using it)
International travel controls 0 - No measures
1 - Screening
2 - Quarantine arrivals from high-risk regions
3 - Ban on high-risk regions
4 - Total border closure
Public information campaigns 0 -No COVID-19 public information campaign
1 - Public officials urging caution about COVID-19
2 - Coordinated public information campaign (e.g. across traditional and social media)