Abstract：
UNASSIGNED: This study aimed to develop an instrument for assessing physical functioning among adults aged 50 years or older living in the community.
UNASSIGNED: Based on a review of various national health surveys and cohort studies, a 144-item bank was constructed for assessing physical functioning. Focus group interviews were conducted among adults aged 50 years or older to investigate their level of understanding of 60 selected items, followed by a pretest of the items on a nationally representative sample (n = 508). The final 25-item questionnaire was tested on an independent sample (n = 259) for validity and reliability based on classical test and item response theories. Predictive validity at the 6-month follow-up was tested in a separate sample (n = 263).
UNASSIGNED: The newly developed Life Functioning (LF) scale assessed the dimensions of functional limitations, disabilities, and social activities. The scale satisfied a one-dimensionality assumption with good item fit and demonstrated criterion validity, construct validity, high internal consistency (Cronbach\'s alpha = 0.93), and test-retest reliability (intra-class correlation coefficient = 0.84; 95% CI, 0.76-0.89). The LF scale comprised 25 items with a total score ranging from 0 to 100. Higher scores indicated higher levels of functioning. The LF score was significantly associated with the physical functioning score at 6 months.
UNASSIGNED: The LF scale was developed to assess the physical functioning of people in their late midlife or older. Future studies should test the instrument on a national sample and evaluate its application in diverse population subgroups.
UNASSIGNED: Based on a review of various national health surveys and cohort studies, a 144-item bank was constructed for assessing physical functioning. Focus group interviews were conducted among adults aged 50 years or older to investigate their level of understanding of 60 selected items, followed by a pretest of the items on a nationally representative sample (n = 508). The final 25-item questionnaire was tested on an independent sample (n = 259) for validity and reliability based on classical test and item response theories. Predictive validity at the 6-month follow-up was tested in a separate sample (n = 263).
UNASSIGNED: The newly developed Life Functioning (LF) scale assessed the dimensions of functional limitations, disabilities, and social activities. The scale satisfied a one-dimensionality assumption with good item fit and demonstrated criterion validity, construct validity, high internal consistency (Cronbach\'s alpha = 0.93), and test-retest reliability (intra-class correlation coefficient = 0.84; 95% CI, 0.76-0.89). The LF scale comprised 25 items with a total score ranging from 0 to 100. Higher scores indicated higher levels of functioning. The LF score was significantly associated with the physical functioning score at 6 months.
UNASSIGNED: The LF scale was developed to assess the physical functioning of people in their late midlife or older. Future studies should test the instrument on a national sample and evaluate its application in diverse population subgroups.
摘要：
■本研究旨在开发一种工具，用于评估居住在社区中的50岁以上成年人的身体机能。
■根据对各种国家健康调查和队列研究的回顾，建造了一个144个项目的银行来评估身体功能。在50岁或以上的成年人中进行焦点小组访谈，以调查他们对60个选定项目的理解水平，然后对具有全国代表性的样本进行项目预测(n=508)。最终的25项问卷在独立样本（n=259）上进行了基于经典测试和项目响应理论的有效性和可靠性测试。在6个月随访时的预测有效性在单独的样本中进行测试(n=263)。
■新开发的生命功能（LF）量表评估了功能限制的维度，残疾人,和社会活动。该量表满足一维假设，具有良好的项目拟合度，并证明了标准有效性，构造效度，内部一致性高(克朗巴赫的α=0.93)，和重测信度(类内相关系数=0.84；95%CI，0.76-0.89)。LF量表包括25个项目，总分从0到100。较高的分数表明较高的功能水平。LF评分与6个月时的身体功能评分显着相关。
■开发LF量表是为了评估中年人或老年人的身体机能。未来的研究应在国家样本上测试该仪器，并评估其在不同人群亚组中的应用。
■根据对各种国家健康调查和队列研究的回顾，建造了一个144个项目的银行来评估身体功能。在50岁或以上的成年人中进行焦点小组访谈，以调查他们对60个选定项目的理解水平，然后对具有全国代表性的样本进行项目预测(n=508)。最终的25项问卷在独立样本（n=259）上进行了基于经典测试和项目响应理论的有效性和可靠性测试。在6个月随访时的预测有效性在单独的样本中进行测试(n=263)。
■新开发的生命功能（LF）量表评估了功能限制的维度，残疾人,和社会活动。该量表满足一维假设，具有良好的项目拟合度，并证明了标准有效性，构造效度，内部一致性高(克朗巴赫的α=0.93)，和重测信度(类内相关系数=0.84；95%CI，0.76-0.89)。LF量表包括25个项目，总分从0到100。较高的分数表明较高的功能水平。LF评分与6个月时的身体功能评分显着相关。
■开发LF量表是为了评估中年人或老年人的身体机能。未来的研究应在国家样本上测试该仪器，并评估其在不同人群亚组中的应用。
