title: A cross sectional survey on health-related quality of life of elementary school students using the Korean version of the EQ-5D-Y.
abstract: OBJECTIVE
  The Korean version of the EQ-5D-Y was launched in 2015 by the EuroQol group. Currently, there is no HRQOL data obtained by using the EQ-5D-Y in Korea. This study aimed to measure health-related quality of life of Korean elementary school students using the EQ-5D-Y.
  
  
  METHODS
  Elementary school students were recruited from 11 primary schools in Gyungbuk, South Korea. The EQ-5D-Y was self-administered in the sample population. Demographic characteristics were collected from the subjects' parents or guardians. The percentage of respondents reporting problems and VAS scores were calculated. Feasibility of the EQ-5D-Y was assessed by analysing the proportion of missing responses. The percentage of reported problems on the dimensions and VAS score between groups were compared by demographic factors.
  
  
  RESULTS
  A total of 2,494 questionnaires were collected. There were 24 (0.96%) missing responses on the EQ-5D-Y and 187 (7.5%) missing VAS score responses. The proportion of reported problems ranged from 2.3% on the mobility dimension to 9.8% on the "having pain or discomfort" dimension. There was no significant difference in the proportion of problems by age group in male participants. However, in females, the older group reported significantly more problems on the "having pain or discomfort" and "feeling worried, sad, or unhappy" dimensions compared to the younger group. Students living with parents with the lowest educational level reported significantly more problems on the "looking after myself" and "doing usual activities" dimensions than did those living with parents with higher levels of education.
  
  
  CONCLUSIONS
  This study showed the distribution of health-related quality of life and explored the feasibility of the EQ-5D-Y for measuring health-related quality of life in Korean elementary school students. Further studies are required to examine other psychometric properties of the Korean EQ-5D-Y.
authors.affiliation: Department of Preventive Medicine, Dongguk University College of Medicine , Gyeongju-si , South Korea.
authors.forename: Sang-Kyu
authors.initials: SK
authors.lastname: Kim
authors.affiliation: Department of Preventive Medicine, University of Ulsan College of Medicine , Seoul , South Korea.
authors.forename: Min-Woo
authors.initials: MW
authors.lastname: Jo
authors.affiliation: Department of Nursing, Dankook University College of Nursing , Cheonan , South Korea.
authors.forename: Seon-Ha
authors.initials: SH
authors.lastname: Kim
keywords: Children; EQ-5D-Y; Health-related quality of life; Korea