Table 2 Comparison of the mean absolute error and mean % absolute error using the Parmar method and nlopt method (exact and non-exact P value) described in this study
Method | Mean Absolute Error (95% CIs) | Mean % Absolute Error (95% CIs) | ||
|---|---|---|---|---|
Ln (HR) | Var ln (HR) | Ln (HR) | Var ln (HR) | |
1. Nlopt method: exact P value | 0.014 (0.007–0.022) | 0.0039 (0.0022–0.0056) | 6.63% (2.69–10.57%) | 20.12% (5.51–34.73%) |
2. Nlopt method: non-exact P value | 0.087 (−0.036–0.210) | 0.0033 (0.0010–0.0055) | 27.37% (8.69–46.05%) | 17.30% (3.68–30.91%) |
3. Parmar | 0.077 (0.039–0.115) | 0.0038 (0.0016–0.0060) | 43.47% (11.18–75.77%) | 20.06% (6.50–33.62%) |