Journal Article CONFOUNDED CONFOUNDING Get access Warren Winkelstein, Jr., Warren Winkelstein, Jr. Dept. of Biomedical & Environmental, Health Sciences, 140 Warren Hall, U. of California-BerkeleyBerkeley, CA 94720 Search for other works by this author on: Oxford Academic PubMed Google Scholar Lynn I. Levin Lynn I. Levin Dept. of Biomedical & Environmental, Health Sciences, 140 Warren Hall, U. of California-BerkeleyBerkeley, CA 94720 Search for other works by this author on: Oxford Academic PubMed Google Scholar American Journal of Epidemiology, Volume 113, Issue 1, January 1981, Pages 99–101, https://doi.org/10.1093/oxfordjournals.aje.a113072 Published: 01 January 1981