Erratum to: Qual Life Res DOI 10.1007/s11136-012-0171-1

In the fourth paragraph of the Discussion section (page 9) in the original publication, the word ‘treatment’ should be replaced by ‘HRQoL’ in the following two sentences:

“However, after accounting for response shift, a positive true change contribution indicated that treatment effects may have been underestimated, leading to false-negative results.” should read “However, after accounting for response shift, a positive true change contribution indicated that HRQoL effects may have been underestimated, leading to false-negative results.”

“Assessment of the treatment’s “true” effects must include individuals’ change in perception due to treatment or change in health, especially when using self-report measures in clinical trials.” should read “Assessment of HRQoL’s “true” effects must include individuals’ change in perception due to treatment or change in health, especially when using self-report measures in clinical trials.”