Khadka Jyoti, Gao Rongrong, Chen Haisi, Zhang Sifang, Wang Qinmei, Huang Jinhai, Pesudovs Konrad
J Refract Surg. 2018 Jun 1;34(6):413-418. doi: 10.3928/1081597X-20180326-01.
To assess psychometric properties of the Hong Kong Quality of Life Questionnaire (HKQ) using Rasch analysis and use it to assess cataract surgery outcomes.
The HKQ was interviewer administered to participants at baseline (preoperative) and 12 months of follow-up (postoperative). Rasch analysis was used to assess and improve psychometric properties of the HKQ using the preoperative data. The responsiveness of the HKQ was assessed on the stacked preoperative and postoperative data, reported with the effect size.
One hundred ninety-nine participants (median age: 72 years; interquartile range: 65 to 78 years) with cataract completed the HKQ at the preoperative assessment. There were more women (58%) and most of the participants had bilateral cataract (83.9%). Nearly half of the participants had undergone surgery in one eye (45.2%) followed by bilateral surgery (38.7%). Psychometric assessment guided by Rasch analysis resulted into a 15-item HKQ with promising psychometric properties including adequate measurement precision (2.09), no misfitting items, near perfect targeting (-0.05), unidimensionality, and with no evidence of item bias. For those who completed the HKQ (n = 82, 41.2%) at the 12-month follow-up visit, all groups demonstrated statistically significant gains in the HKQ scores, with the highest gain in participants who had undergone bilateral surgery (effect size: 2.61).
The 15-item HKQ was valid and psychometrically sound and might be a highly responsive instrument to measure cataract surgery outcomes in China. This study demonstrated that cataract surgery significantly improves quality of life in the Chinese population. [J Refract Surg. 2018;34(6):413-418.].
使用拉施分析评估香港生活质量问卷（HKQ）的心理测量特性，并使用该问卷评估白内障手术效果。
由访员在基线（术前）和随访12个月（术后）时对参与者进行HKQ问卷调查。使用术前数据通过拉施分析评估并改善HKQ的心理测量特性。根据术前和术后的累积数据评估HKQ的反应度，并报告效应量。
199例白内障患者（中位年龄：72岁；四分位间距：65至78岁）在术前评估时完成了HKQ问卷调查。女性患者较多（58%），大多数参与者患有双侧白内障（83.9%）。近一半的参与者（45.2%）单眼接受过手术，其次是双眼手术（38.7%）。在拉施分析指导下的心理测量评估得出了一份包含15个条目的HKQ，其具有良好的心理测量特性，包括足够的测量精度（2.09）、无拟合不佳的条目、接近完美的目标定位（-0.05）、单维性且无条目偏差的证据。在12个月随访时完成HKQ问卷调查的患者（n = 82，41.2%）中，所有组的HKQ得分均有统计学意义的提高，其中接受双眼手术的参与者得分提高最多（效应量：2.61）。
这份包含15个条目的HKQ有效且在心理测量上合理，可能是测量中国白内障手术效果的高反应度工具。本研究表明白内障手术显著改善了中国人群的生活质量。[《屈光手术杂志》。2018；34(6):413 - 418。]
