%0 Journal Article
%T Injustice Experience Questionnaire, Japanese version: cross-cultural factor-structure comparison and demographics associated with perceived injustice
%J PLoS one
%D 2016
%A Yamada, Keiko
%A Adachi, Tomonori
%A Mibu, Akira
%A Nishigami, Tomohiko
%A Motoyama, Yasushi
%A Uematsu, Hironobu
%A Matsuda, Yoichi
%A Sato, Hitoaki
%A Hayashi, Kenichi
%A Cui, Renzhe
%A Takao, Yumiko
%A Shibata, Masahiko
%A Iso, Hiroyasu
%V 11
%N 8
%P e0160567-e0160567
%X OBJECTIVE: The Injustice Experience Questionnaire (IEQ) assesses injury-related perceived injustice. This study aimed to (1) develop a Japanese version (IEQ-J), (2) examine its factor structure, validity, and reliability, and (3) discover which demographic variable(s) positively contributed to prediction of IEQ-J scores. <br><br>METHODS: Data from 71 patients (33 male, 38 female; age = 20+) with injury pain were employed to investigate factor structure by exploratory and confirmatory factor analyses. Concurrent validity was examined by Pearson correlation coefficients among the IEQ-J, Brief Pain Inventory (BPI), and Pain Catastrophizing Scale (PCS). Internal consistency was investigated by Cronbach's alpha, and test-retest reliability was indicated with intra-class correlations (ICCs) in 42 of 71 patients within four weeks. Relations between demographic variables and IEQ-J scores were examined by covariance analysis and linear regression models. <br><br>RESULTS: IEQ-J factor structure differed from the original two-factor model. A three-factor model with Severity/irreparability, Blame/unfairness, and Perceived lack of empathy was extracted. The three-factor model showed goodness-of-fit with the data and sufficient reliability (Cronbach's alpha of 0.90 for total IEQ-J; ICCs = 0.96). Pearson correlation coefficients among IEQ-J, BPI, and PCS ranged from 0.38 to 0.73. Pain duration over a year (regression coefficient, 11.92, 95%CI; 5.95-17.89) and liability for injury on another (regression coefficient, 12.17, 95%CI; 6.38-17.96) predicted IEQ-J total scores. <br><br>CONCLUSIONS: This study evidenced the IEQ-J's sound psychometric properties. The three-factor model was the latter distinctive in the Japanese version. Pain duration over a year and injury liability by another statistically significantly increased IEQ-J scores.<p /> <p>Language: en</p>
%G en
%I Public Library of Science
%@ 1932-6203
%U http://dx.doi.org/10.1371/journal.pone.0160567