Discussion
This study investigated the impact of the preceding cancer-specific HRQOL instruments on the subsequent EQ-5D-5L’s responses. Regarding the mobility question, the answers differed between the groups with the EQ-5D-5L placed first and second or third. The responses to the usual activities question varied between those with the EQ-5D-5L positioned first and second. As compared to the mean EQ-5D-5L indexes of the former, those of the latter were lower. Few correlation coefficients between the EQ-5D-5L index and the subscales of disease-specific HRQOL instruments differed between the groups with the EQ-5D-5L positioned first and second. The patients in the group with the EQ-5D-5L placed last tended to complete the EQ-5D-5L.