Key points are not available for this paper at this time.
Journal Article CONCEPTS OF INTERACTION Get access KENNETH J. ROTHMAN, KENNETH J. ROTHMAN 1 1Department of Epidemiology, Harvard School of Public Health677 Huntington Ave., Boston, MA 02115 1reprint requests to Dr. Rothman. Search for other works by this author on: Oxford Academic PubMed Google Scholar SANDER GREENLAND, SANDER GREENLAND 2Division of Epidemiology, University of CaliforniaLos Angeles, CA. Search for other works by this author on: Oxford Academic PubMed Google Scholar ALEXANDER M. WALKER ALEXANDER M. WALKER 1Department of Epidemiology, Harvard School of Public Health677 Huntington Ave., Boston, MA 02115 Search for other works by this author on: Oxford Academic PubMed Google Scholar American Journal of Epidemiology, Volume 112, Issue 4, October 1980, Pages 467–470, https://doi.org/10.1093/oxfordjournals.aje.a113015 Published: 01 October 1980
Rothman et al. (Wed,) studied this question.