Investigating the assumptions of the self-controlled case series method

Autor: Yonas Ghebremichael-Weldeselassie, Liam Smeeth, Ian J. Douglas, C. Paddy Farrington, Heather Whitaker
Rok vydání: 2017
Předmět:
Zdroj: Statistics in Medicine. 37:643-658
ISSN: 0277-6715
DOI: 10.1002/sim.7536
Popis: We describe some simple techniques for investigating 2 key assumptions of the self-controlled case series (SCCS) method, namely, that events do not influence subsequent exposures and that events do not influence the length of observation periods. For each assumption, we propose some simple tests based on the standard SCCS model, along with associated graphical displays. The methods also enable the user to investigate the robustness of the results obtained using the standard SCCS model to failure of assumptions. The proposed methods are investigated by simulations and applied to data on measles, mumps and rubella vaccine, and antipsychotics.
Databáze: OpenAIRE