Most people completing a questionnaire

Most people completing a questionnaire
Who
Sanofi Aventis de México S.A. de C.V. , La Asociación Psiquiátrica Mexicana
What
3461 people
Where
Mexico (Aguascalientes,Aguascalientes International Speedway)
When
The most people completing a questionnaire is 3,461 and was achieved by Sanofi Aventis de México S.A. de C.V. and La Asociación Psiquiátrica Mexicana (both Mexico) at the Aguascalientes International Speedway in Aguascalientes, Mexico, on 21 March 2010. The questionnaire was titled the Atenas Sleep Scale and asked questions about insomnia. The questionnaire was distributed to the audience at a NASCAR car race.