Yu Wan1, Liming Zhao2, Chen Huang1, Yanhui Xu3, Min Sun4, Yang Yang5, Li An6, Shuxuan Lv7, Yanan Yu8, Dongmei Chen9, Peng Zhou1, Yinhao Wang1, Mingzhou Zhang1, Aimin Jiang5, Zhimin Chen3, Xuemin Li1. 1. Peking University Third Hospital, Beijing, China. 2. Beijing Fengtai Hospital, Beijing, China. 3. Hebei Eye Hospital, Xingtai, China. 4. General Hospital of Huabei Petroleum Administration Bureau, Renqiu, China. 5. The Hospital of Shunyi District, Beijing, China. 6. Datong Aier Eye Hospital, Datong, China. 7. People's Hospital of YongQing, Langfang, China. 8. Baoding Zhuozhou Gem Flower Hospital, Zhuozhou, China. 9. Baoding Gem Flower Dongfang Hospital, Xushui, China.
Abstract
PURPOSE: The present study aimed to investigate and compare the psychometric properties of the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25) and the Visual Function Index-14 (VF-14) in a large sample of patients with cataracts. METHODS: A total of 1052 patients with bilateral age-related cataracts were recruited in the study. Patients with other comorbidities that severely impacted vision were excluded. Participants completed the two questionnaires in random order. Classical test theory and Rasch analyses were used to assess the psychometric properties of the questionnaires. RESULTS: Complete data were obtained from 899 patients. The mean overall index score on the NEI VFQ-25 was 76.1 ± 19.0, while that on the VF-14 was 46.5 ± 15.0. Cronbach's α-values for the NEI VFQ-25 and VF-14 were 0.89 and 0.95, respectively. Ceiling effects were observed on nine of the 12 subscales in the NEI VFQ-25. The correlation between total scores on the NEI VFQ-25 and VF-14 was moderate (r = 0.600; p < 0.001), and subscales of the NEI VFQ-25 were weakly or moderately correlated with the similar domains on the VF-14. Rasch analysis revealed ordered category thresholds and sufficient person separation for both instruments, while the two questionnaires had critical deficiencies in unidimensionality, targeting and differential item functioning. CONCLUSION: Neither the NEI VFQ-25 nor VF-14 is optimal for the assessment of vision-related quality of life in typical Chinese patients with cataracts. The potential deficiencies of the questionnaires should be taken into consideration prior to application of the instruments or interpretation of the results.
PURPOSE: The present study aimed to investigate and compare the psychometric properties of the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25) and the Visual Function Index-14 (VF-14) in a large sample of patients with cataracts. METHODS: A total of 1052 patients with bilateral age-related cataracts were recruited in the study. Patients with other comorbidities that severely impacted vision were excluded. Participants completed the two questionnaires in random order. Classical test theory and Rasch analyses were used to assess the psychometric properties of the questionnaires. RESULTS: Complete data were obtained from 899 patients. The mean overall index score on the NEI VFQ-25 was 76.1 ± 19.0, while that on the VF-14 was 46.5 ± 15.0. Cronbach's α-values for the NEI VFQ-25 and VF-14 were 0.89 and 0.95, respectively. Ceiling effects were observed on nine of the 12 subscales in the NEI VFQ-25. The correlation between total scores on the NEI VFQ-25 and VF-14 was moderate (r = 0.600; p < 0.001), and subscales of the NEI VFQ-25 were weakly or moderately correlated with the similar domains on the VF-14. Rasch analysis revealed ordered category thresholds and sufficient person separation for both instruments, while the two questionnaires had critical deficiencies in unidimensionality, targeting and differential item functioning. CONCLUSION: Neither the NEI VFQ-25 nor VF-14 is optimal for the assessment of vision-related quality of life in typical Chinese patients with cataracts. The potential deficiencies of the questionnaires should be taken into consideration prior to application of the instruments or interpretation of the results.
Authors: Mukharram M Bikbov; Gyulli M Kazakbaeva; Ellina M Rakhimova; Iuliia A Rusakova; Albina A Fakhretdinova; Azaliia M Tuliakova; Songhomitra Panda-Jonas; Timur R Gilmanshin; Rinat M Zainullin; Natalia I Bolshakova; Kamilia R Safiullina; Ainur V Gizzatov; Ildar P Ponomarev; Dilya F Yakupova; Nail E Baymukhametov; Nikolay A Nikitin; Jost B Jonas Journal: JAMA Netw Open Date: 2021-08-02
Authors: Sergi Blancafort Alias; Zoraida Del Campo Carrasco; Ignacio Salvador-Miras; Sabina Luna Mariné; María José Gómez Prieto; Francesca Liñán Martín; Antoni Salvà Casanovas Journal: Clin Ophthalmol Date: 2022-05-27
Authors: Mukharram M Bikbov; Gyulli M Kazakbaeva; Ellina M Rakhimova; Iuliia A Rusakova; Albina A Fakhretdinova; Azaliia M Tuliakova; Songhomitra Panda-Jonas; Natalia I Bolshakova; Kamilia R Safiullina; Ainur V Gizzatov; Ildar P Ponomarev; Dilya F Yakupova; Nail E Baymukhametov; Nikolay A Nikitin; Jost B Jonas Journal: BMJ Open Date: 2022-04-26 Impact factor: 3.006
Authors: Mukharram M Bikbov; Gyulli M Kazakbaeva; Timur R Gilmanshin; Rinat M Zainullin; Ellina M Rakhimova; Albina A Fakhretdinova; Azaliia M Tuliakova; Iuliia A Rusakova; Songhomitra Panda-Jonas; Ildar F Nuriev; Artur F Zaynetdinov; Ainur A Zinnatullin; Inga I Arslangareeva; Ainur V Gizzatov; Natalia I Bolshakova; Kamilia R Safiullina; Jost B Jonas Journal: Sci Rep Date: 2022-07-23 Impact factor: 4.996