Thomas, D C Re: "Conditions for confounding of the risk ratio and of the odds ratio". [electronic resource] - American journal of epidemiology Jan 1986 - 200-1 p. digital Publication Type: Letter ISSN: 0002-9262 Standard No.: 10.1093/oxfordjournals.aje.a114219 doi Subjects--Topical Terms: EpidemiologyHumans