How important are paper copies of questionnaires? Testing invitations modes when studying social inequalities in smoking among young adults.

Authors :: Gagné T
Agouri R
Cantinotti M
Boubaker A
Frohlich KL
Source :: International journal of public health [Int J Public Health] 2014 Feb; Vol. 59 (1), pp. 207-10. Date of Electronic Publication: 2013 Apr 19.
Publication Year :: 2014

Subjects :: Adolescent
Adult
Female
Humans
Internet
Male
Paper
Quebec epidemiology
Research Design
Socioeconomic Factors
Young Adult
Bias
Smoking epidemiology
Social Class
Surveys and Questionnaires

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