title: Ratio of observed and expected joint effects.
authors.affiliation: Department of Epidemiology, Tulane School of Public Health and Tropical Medicine, New Orleans, LA, hgebrekr@tulane.edu Department of Epidemiology, Center for Population Health and Clinical Epidemiology, Brown University School of Public Health, Providence, RI.
authors.forename: Hirut T
authors.initials: HT
authors.lastname: Gebrekristos
authors.forename: Chanelle J
authors.initials: CJ
authors.lastname: Howe
mesh_terms: D006801:Humans; D011634:Public Health; D012307:Risk Factors; D013223:Statistics as Topic