Table 1. Sex differences in lifespan over four birth cohorts in Utah.
| Birth cohort | estimate | SE | z | p | AF |
|---|---|---|---|---|---|
| 1820–1844 | −0.12 | 0.004 | −3.21 | 0.0013 | 0.99 |
| 1845–1869 | 0.0039 | 0.002 | 2.11 | 0.035 | 1.00 |
| 1870–1894 | 0.029 | 0.001 | 2.15 | <0.0001 | 1.03 |
| 1895–1919 | 0.048 | 0.002 | 2.52 | <0.0001 | 1.05 |
Shown are parameter estimates (estimate) with associated standard errors (SE), z and p-values for the interaction between each birth cohort and sex obtained from parametric survival models. The acceleration factor (AF) indicates the estimated mean survival time for females in relation to males in each cohort.