Table 6. Summary of the bivariate mixed model, with a random intercept and slope function of relative telomere length (RTL) with age, and a random intercept of lifetime reproductive success (LRS), at the individual level. This model estimates the variance and covariance in RTL, rate of RTL change with age, and LRS among individuals in the Lundy house sparrows. Significant effects are highlighted in bold, excluding fixed intercepts.