Table 2.
Model Concordance and Likelihood Ratio (Rao–Scott) Test Statistics of Biological Age Measures in Survey-Weighted Cox Regression Analysis of NHANES Data
| Survey-Weighted Cox Model | Concordance (SE) | Term Tested | 2Log LR | Significance |
|---|---|---|---|---|
| Base (sex + race + age) | .686 (.021) | Age | 128.83 | *** |
| Base + BE17 | .744 (.019) | Age | 6.89 | ** |
| BE17 | 38.87 | *** | ||
| Base + BEC17 | .744 (.019) | Age | 1.59 | n.s. |
| BEC17 | 38.87 | *** | ||
| Base + FI17 | .760 (.018) | Age | 19.29 | *** |
| FI17 | 135.70 | *** | ||
| Base + FI17 + BE17 | .762 (.018) | Age | 8.07 | ** |
| FI17 | 55.34 | *** | ||
| BE17 | 2.79 | n.s. | ||
| Base + FI17 + BEC17 | .762 (.018) | Age | 0.44 | n.s. |
| FI17 | 55.34 | *** | ||
| BEC17 | 2.79 | n.s. |
Notes: LR = likelihood ratio; NHANES = National Health and Nutrition Examination Survey. The concordance estimates the accuracy of each model. The 2logLR and significance are to assess the significance of the indicated term.
** .001 < p ≤ .01. ***p ≤ .001; n.s. = p > .05.