Table 1. Data sources used to analyse the lockdown impact on age-specific contact patterns and behaviours, France, April 2020.

Data source	Reference	Type of data	Use
SocialCov pre-lockdown survey	[7]	Pre-lockdown survey of contacts for the same study population	Comparison to pre-lockdown contacts at work for the same population
COMES-F survey	[10]	Survey on contact patterns by age in the French population in 2012	Comparison to pre-lockdown contacts in the French population
Insee	[24]	Demographic data of the French population (age and sex)	Population correction for the global contact matrix and the lockdown associated behaviours
COVID-19 Barometer	[9]	Survey on preventive behaviours, compliance with French policies and recommendations among the populationa	Population correction for the global contact matrix

COVID-19: coronavirus disease; Insee: The French National Institute of Statistics and Economic Studies.

^a Details provided in the Supplement, Section B.