Table 3 Predictive accuracy of the algorithms by the observed UK EQ-5D-3L index score
From: Assessing the external validity of algorithms to estimate EQ-5D-3L from the WOMAC
EQ-5D-3L index | n | Barton | Xie | Wailoo | ||
|---|---|---|---|---|---|---|
WA | CEC | |||||
<0.5 | 100 | ME (95 % CI) | 0.308 (0.267 to 0.349) | 0.551 (0.529 to 0.574) | 0.256 (0.209 to 0.303) | 0.219 (0.151 to 0.288) |
MAE | 0.325 | 0.551 | 0.281 | 0.324 | ||
RMSE | 0.372 | 0.563 | 0.350 | 0.410 | ||
0.5–0.699 | 193 | ME (95 % CI) | −0.111 (−0.130 to −0.091) | 0.057 (0.049 to 0.065) | −0.144 (−0.169 to −0.119) | −0.126 (−0.165 to −0.086) |
MAE | 0.142 | 0.063 | 0.187 | 0.194 | ||
RMSE | 0.177 | 0.079 | 0.228 | 0.307 | ||
0.7–0.899 | 645 | ME (95 % CI) | −0.098 (−0.106 to −0.089) | −0.013 (−0.017 to −0.009) | −0.094 (−0.106 to −0.081) | −0.054 (−0.070 to −0.038) |
MAE | 0.110 | 0.038 | 0.147 | 0.139 | ||
RMSE | 0.147 | 0.048 | 0.187 | 0.211 | ||
0.9–1.0 | 130 | ME (95 % CI) | −0.215 (−0.223 to −0.206) | −0.183 (−0.188 to −0.179) | −0.096 (−0.113 to −0.079) | −0.062 (−0.081 to −0.042) |
MAE | 0.215 | 0.183 | 0.096 | 0.062 | ||
RMSE | 0.221 | 0.185 | 0.137 | 0.131 | ||
All | 1068 | ME (95 % CI) | −0.076 (−0.087 to −0.066) | 0.032 (0.021 to 0.043) | −0.070 (−0.082 to −0.058) | −0.042 (−0.057 to −0.028) |
MAE | 0.148 | 0.108 | 0.161 | 0.157 | ||
RMSE | 0.194 | 0.191 | 0.210 | 0.249 | ||
Absolute error > |0.05 observed|, % | 78.8 | 58.2 | 82.8 | 75.3 | ||
Absolute error > |0.10 observed|, % | 64.7 | 36.4 | 65.9 | 53.3 | ||
Absolute error > |0.25 observed|, % | 29.7 | 11.3 | 36.2 | 24.3 | ||