Model | id | \(\hat \theta _{1}\) | \(\hat \theta _{2}\) | \(\text {Var} \left (\hat \theta _{1} \right)\) | \(\text {Cov} \left (\hat \theta _{1},\hat \theta _{2} \right)\) | \(\text {Var} \left (\hat \theta _{2} \right)\) |
---|---|---|---|---|---|---|
Restricted cubic splines | 1 | 0.55 | 0.55 | 0.065 | 0.065 | 0.065 |
 | 2 | 0.59 | 0.59 | 0.031 | 0.031 | 0.031 |
 | 3 | 0.84 | −1.69 | 0.054 | −0.12 | 0.38 |
 | 4 | 0.47 | −0.54 | 0.021 | −0.043 | 0.15 |
 | 5 | 0.78 | −1.25 | 0.23 | −0.62 | 1.8 |
Fractional Polynomials | 1 | 17.47 | −7.84 | 2.9e+02 | −2.2e+02 | 1.8e+02 |
 | 2 | 29.59 | −12.42 | 2.5e+02 | −1.6e+02 | 1e+02 |
 | 3 | 32.12 | −13.47 | 1.4e+02 | −70 | 37 |
 | 4 | 18.48 | −6.42 | 1.8e+02 | −93 | 49 |
 | 5 | 21.97 | −7.00 | 2.3e+02 | −1.1e+02 | 55 |
Emax | 1 | 8.13 | 3.13 | 27 | 24 | 36 |
 | 2 | 11.39 | 0.00 | 38 | 35 | 42 |
 | 3 | 10.54 | 0.00 | 37 | 53 | 1e+02 |
 | 4 | 9.20 | 0.00 | 60 | 1.4e+02 | 3.6e+02 |
 | 5 | 13.28 | 0.94 | 23 | 2.7 | 2.7 |
Quadratic | 1 | 1.54 | −0.09 | 0.96 | −0.086 | 0.0083 |
 | 2 | 1.54 | −0.05 | 0.35 | −0.017 | 0.00089 |
 | 3 | 1.40 | −0.04 | 0.18 | −0.0055 | 0.00018 |
 | 4 | 0.83 | −0.02 | 0.14 | −0.0047 | 0.00017 |
 | 5 | 1.08 | −0.02 | 0.51 | −0.016 | 0.00051 |
Piecewise linear | 1 | 0.55 | Â | 0.065 | Â | Â |
 | 2 | 0.59 |  | 0.031 |  |  |
 | 3 | 0.84 | −1.69 | 0.054 | −0.12 | 0.38 |
 | 4 | 0.47 | −0.54 | 0.021 | −0.043 | 0.15 |
 | 5 | 0.78 | −1.25 | 0.23 | −0.62 | 1.8 |