Table 2.

Expected Years of Life from 1957 to 2008 by Gender, IQ, Farm Origin, Parents’ Income, and Rank in High School Class: Wisconsin Longitudinal Study

Variables in Weibull model	Men	Women	Low IQ	High IQ	Farm	Nonfarm	Low income	High income	Low rank	High rank
Model 1: gender and IQ	50.5	51.8	50.9	51.5
Model 2: gender, IQ, farm origin, parents’ income	50.5	51.8	50.9	51.4	51.6	51.1	50.7	51.6
Model 3: gender, IQ, farm origin, parents’ income, rank in high school class	50.7	51.7	51.3	51.1	51.6	51.2	50.8	51.6	50.5	51.9