Table 3.
Interquartile Range (IQR) of Estimated Individual Trajectories Regressed on Age by Race/Gender
| Total (n = 29) | White men (n = 29) | Black men (n = 27) | White women (n = 29) | Black women (n = 27) | |
|---|---|---|---|---|---|
| Intercept | 2.7803*** (.0645) | 1.9276*** (.0502) | 2.7700*** (.2362) | 3.1164*** (.0796) | 4.8248*** (.1649) |
| Age | .0471*** (.0040) | .0417*** (.0031) | .0580*** (.0156) | .0457*** (.0049) | .0024 (.0109) |
| F Sig. | 141.84*** | 183.84*** | 13.84*** | 87.73*** | .05 |
| Adj-R2 | .83 | .87 | .33 | .76 | −.04 |
| RMSE | .18 | .14 | .63 | .22 | .44 |
Note. Calculation of IQR limited to ages 55–81 for black men and black women due to the sparsity of data (<30 data points) over age 81. Linear, quadratic, cubic, and quartic age functions tested for the total sample and for each race/gender and best-fitting model selected based on RMSE. Coefficients with standard errors (in parentheses) reported.
***p < .001.