Validity and reliability study of Turkish version on low vision with quality of life questionnaire

AIM:To adapt the low vision-related quality of life(LVQOL) instrument into Turkish language and to assess its validity and reliability.METHODS:The study was conducted in 387 patients attending the Centre of Low Vision Rehabilitation,Faculty of Medicine,Ankara University.For statistical analyses,the Spearman's correlation coefficient,Cronbach's alpha coefficient and Confirmatory Factor Analysis(CFA) were used.RESULTS:According to results of CFA,the item in the 'Adjustment' subscale because of having the factor loading below 0.40,was excluded from the questionnaire.The reliability of the questionnaire was assessed according to Cronbach's alpha coefficients.The reliability of the 'Distance Vision,Mobility,and Lighting' subscale was ?琢=0.863;of the 'Adjustment' subscale was ?琢=0.694;'Reading and Fine Work' was ?琢=0.791,and 'Activities of Daily Living' was ?琢= 0.770.So these results indicate that the questionnaire is reliable to measure the vision related quality of life of low-vision patients.The correlations between the subscales were also analyzed,and the correlation between 'Adjustment' and 'Reading and Fine Work' was found to be the lowest(rs=0.336,P <0.001),whereas the strongest correlation was found between the 'Reading and Fine Work',and 'Activities of Daily Living'.Additionally,the 'Adjustment' dimension showed the strongest correlation with only 'Distance Vision,Mobility,and Lighting' dimension.CONCLUSION:After removing the last item in the second dimension,the Turkish adaptation of all dimensions of the LVQOL has been shown to be reliable,valid and suitable for use in patients with low vision in Turkey.

土耳其文版低视力生活质量量表的效度和信度研究(英文)

目的:把低视力相关的生活质量(LVQOL)文书改编为土耳其文,并评估其效度和信度。方法:这项研究是在387位参加安卡拉大学医学院,低视力康复中心的患者中进行的。使用Spearman相关系数,Cronbachα系数和验证性因素分析(CFA)进行统计分析。结果:根据CFA结果,在"调节能力"维的条目,因为有低于0.40的因子负荷故被排除在调查问卷之外。根据Cronbachα系数,对量表的信度进行了评估。"远视力,移动和光感"维的信度是α=0.863;"调节能力"维是α=0.694;"读和精细工作"α=0.791,"日常生活能力"α=0.770。因此,这些结果表明,用量表来衡量低视力患者的视力相关的生活质量是可靠的。对维之间的相关性也进行了分析,"调节能力"和"读和精细工作"之间的相关性被认为是最低的(rs=0.336,P<0.01),而"读和精细工作"与"日常生活能力"之间的相关性被发现是最强的。此外,"调节能力"仅与"远视力,移动和光感"表现最强的相关性。结论:删除第二个维中最后一个条目后,对LVQOL所有维的土耳其文改编已被证明是可靠的,有效的,适合在土耳其的低视力患者中使用。