Ettema Teake P, Dröes Rose-Marie, de Lange Jacomine, Mellenbergh Gideon J, Ribbe Miel W
Department of Psychiatry/Alzheimer Centre, Institute for Extramural Medicine (EMGO), VU University Medical Centre Amsterdam, The Netherlands.
Int J Geriatr Psychiatry. 2007 Jun;22(6):549-56. doi: 10.1002/gps.1713.
To develop a Quality of Life questionnaire rated by professionals that can be used for people with dementia in different stages of the disease, living in residential settings.
Development was performed in two phases: item generation and pilot testing, and a field survey to evaluate the psychometric properties. For unidimensionality we used a non-parametric model from item response theory: the Mokken scaling model, and computed the corresponding scalability coefficients, using a theory driven strategy.
The pilot survey resulted in a list of 49 items. The field survey was performed in a sample of 238 people with dementia residing in ten nursing homes. The scalability of the subscales positive affect, negative affect, restless tense behavior, and social relations is strong (0.50 < H < 0.63); for care relationship, positive self image, feeling at home, and having something to do, scalability was moderate (0.40 < H < 0.49), and for social isolation it was weak (H = 0.34). The reliability coefficient Rho (under assumption of double monotonicity) varied from 0.60 for social isolation to 0.90 for positive affect (Cronbach's alpha varied from 0.59 to 0.89). Twenty-one of 40 items are suited for people with very severe dementia.
The QUALIDEM is an easy to administer and sufficiently reliable rating scale that provides a QOL profile of persons with dementia in residential settings. The QUALIDEM can be used for evaluation as well as for research and practice innovation.
开发一种由专业人员评定的生活质量问卷，可用于居住在养老院中处于疾病不同阶段的痴呆症患者。
开发分两个阶段进行：条目生成与预测试，以及评估心理测量特性的现场调查。对于单维性，我们使用项目反应理论中的非参数模型：莫肯量表模型，并采用理论驱动策略计算相应的量表可扩展性系数。
预调查得出了一份包含49个条目的清单。现场调查在居住于十家养老院的238名痴呆症患者样本中进行。积极情感、消极情感、不安紧张行为和社会关系子量表的可扩展性较强（0.50 < H < 0.63）；护理关系、积极自我形象、宾至如归感和有事可做子量表的可扩展性为中等（0.40 < H < 0.49），社会隔离子量表的可扩展性较弱（H = 0.34）。可靠性系数Rho（在双重单调性假设下）从社会隔离的0.60到积极情感的0.90不等（克朗巴哈系数从0.59到0.89不等）。40个条目中有21个适用于重度痴呆患者。
痴呆症生活质量量表（QUALIDEM）是一种易于实施且可靠性足够的评定量表，可提供居住环境中痴呆症患者的生活质量概况。该量表可用于评估以及研究和实践创新。
