Correction to: Mapping PedsQL™ scores onto CHU9D utility scores: estimation, validation and a comparison of alternative instrument versions

Correction to: Quality of Life Research https://doi.org/10.1007/s11136-019-02357-9

In the original publication of the article, the equation CHU9D_Predicted = exp(BETA_Prediction)/(1 + exp(BETA _Prediction)) was formatted incorrectly under Model 2. The correct version is provided below:

Model 2—assuming a 15-year-old female with a score of 50 in each functioning dimension:

$$ {\text{BETA}}_{\text{Prediction}} = 1.611745 - 4.724501*\left( {{\text{Physical}}\,{\text{Functioning}}} \right) + 2.447472*\left( {{\text{Emotional}}\,{\text{Functioning}}} \right) + 0.9967647 *\left( {{\text{School}}\,{\text{Functioning}}} \right)+ 4.144465*\left( {{\text{Physical}}\,{\text{Functioning}}} \right)^{2} + 0.1686639*\left( {\text{Male}} \right) - 0.1198546*\left( {\text{Age}} \right) $$

$$ {\text{CHU}}9{\text{D}}_{\text{Predicted}} = \exp ({\text{BETA}}_{\text{Prediction}} )/\left( {1 + \exp \left( {{\text{BETA}}_{\text{Prediction}} } \right)} \right) \to {\text{BETA}}_{\text{Prediction}} = 1.611745 - 4.724501*\left( {50 /100} \right) + 2.447472*\left( {50 /100} \right) + 0.9967647*\left( {50 /100} \right) + 4.144465*\left( {50 /100} \right)^{2} + 0.1686639*0 - 0.1198546*15 = 0.20991 \to {\text{CHU}}9{\text{D}}_{\text{Predicted}} = \exp \left( {0.20991} \right)/\left( {1 + \exp \left( {0.20991} \right)} \right) = 0.55$$

The original article has been corrected.