In the SOA's Factors Affecting Retirement Mortality 'FARM' research report, among the factors studied were age, education, gender, income, marital status, occupation, and race & ethnicity. This web page summarizes material from the following bibliographical source that touches on all of these factors: Effects Of Socio–Demographic Variables On Adult Mortality In The United States: Comparisons By Sex, Age, And Cause Of Death by Jeffrey Kallan, Social Biology, 44: 136–147.