Ocular Surface Disease Index Questionnaire (OSDI-Q), Unidimensionality, and Differential Item Functioning
Year: 2024
Type: article
Abstract: Objective The OSDI-Q is a 12-item scale used instrument for DED prevalence, assess symptom severity, and impact on vision-related functioning. The research analysis investigates the precision, separation index and reliability of unidimensionality, and DEF, stratified by age and gender. The reliability analysis is to assess the internal consistency of the scale using Cronbach's α coefficient and McDonald's ω coefficient with item-rest correlations. Method 634 respondents took part in the OSDI questionaire. Rasch analysis was conducted using precision, separation index, and reliability for items and person, item and person fit statistics, assessing unidimensionality stratified by age and gender, and the use of SPSS to conduct the reliability analysis of the scale using analytical coefficients. Results The OSDI-Q items displayed robust reliability, with high PSI values of 7.63 and 0.98, respectively. Infit and outfit statistics were within acceptable ranges, explaining 39.90 % of variance. Differential item functioning was observed among the age groups involved. Additionally, the contrast in the principal component analysis of the unexplained variance exhibited an eigenvalue of 2.80 and a proportion of variance of 14%. DIF analysis showed significant differences for age groups of (16-26 years) and (27-40 years). The coefficients of Cronbach's and McDonald's are 0.85 for OSDI-Q demonstrated strong internal consistency. Conclusions OSDI-Q displayed appropriate infit and outfits. DIF analysis results of OSDI-Q of age group (16-26 years) performed better in poor vision while age group (27-40 years) performed better in areas with low humidity. Furthermore, the results of DIF analysis in males group performed better in driving at night, while the female group showed better performance in the questinaire. The OSDI-Q items scale reliability data for Cronbach's scale show high internal consistency and reliability. This research can help the medical communities to begin a better surge for medically integrated research.
Source: JAMA Ophthalmology
Authors: Youngsub Eom, Ikhyun Jun, Hyun Sun Jeon, Dong Hui Lim, Hun Lee, Ho Sik Hwang, So-Hyang Chung, Tae-Young Chung, Jae Yong Kim, Sun Woong Kim, Chul Young Choi, Jong Suk Song, Mee Kum Kim, Kyoung Yul Seo, Joon Young Hyon
Institutions: Korea University, Korea University Medical Center, Korea University Ansan Hospital, Yonsei University, Yonsei University Health System, Seoul National University, Seoul National University Bundang Hospital, Samsung Medical Center, Sungkyunkwan University, Asan Medical Center, University of Ulsan, The Catholic University of Korea Yeouido St. Mary's Hospital, Catholic University of Korea, The Catholic University of Korea Seoul St. Mary's Hospital, Kangbuk Samsung Hospital, Korea University Guro Hospital, Seoul National University Hospital
Language: English
Field: Medicine
Domain: Health Sciences
Open Access status: hybrid
OpenAlex ID: W4404435204