Methods of the International Tobacco Control (ITC) Four Country Survey.
ME Thompson, GT Fong, D Hammond, C Boudreau, P Driezen, A Hyland, R Borland, KM Cummings, GB Hastings, M Siahpush, AM Mackintosh, FL Laux
Tobacco Control | Published : 2006
This paper outlines the design features, data collection methods and analytic strategies of the International Tobacco Control (ITC) Four Country Survey, a prospective study of more than 2000 longitudinal respondents per country with yearly replenishments. This survey possesses unique features that sets it apart among surveys on tobacco use and cessation. One of these features is the use of theory-driven conceptual models. In this paper, however, the focus is on the two key statistical features of the survey: longitudinal and "quasi-experimental" designs. Although it is often possible to address the same scientific questions with a cross-sectional or a longitudinal study, the latter has the m..View full abstract