Application of item response theory MG-Bilog software in the analysis of instrument

doi:10.3969/j.issn.2095-4344.2016.49.022

Abstract

Abstract:

BACKGROUND: Item response theory is gradually used in the scale and questionnaire. However, the principles are profound and complicated, which makes it difficult to popularize. Therefore, the researchers have developed a series of softwares such as Bilog-MG software to deal with two-category data through writing program or clicking on the page.
OBJECTIVE: To introduce the Bilog-MG software using an example.
METHODS: Four items of physical role in the SF-36 scale were selected, and a total of 532 patients with nasopharyngeal carcinoma were enrolled for analysis. The main steps of Bilog-MG software included: basic definition and analysis model, definition of item analysis and estimation methods, definition of test score, definition of the data, definition of the correct answer, saving the data, and generating grammar.
RESULTS AND CONCLUSION: (1) The steps of Bilog-MG software focused on the definition of the model (the number of test, grouping, items of test), definition of the analysis model (single parameter, double parameters, three parameters model), and definition of data and format. (2) The results of analysis included: item statistics, item parameter estimation values and the reliability coefficient. It also included the following graphics: item characteristic curves, item information curve and overall information curve. (3) In conclusion, the Bilog-MG software is easy to learn, and can accurately estimate the item and ability parameters. We hope Bilog-MG software can be widely used in medical research.

中国组织工程研究杂志出版内容重点：肾移植；肝移植；移植；心脏移植；组织移植；皮肤移植；皮瓣移植；血管移植；器官移植；组织工程

Key words: Questionnaires, Software, Quality of Life, Tissue Engineering

CLC Number:

R318

Chen Xin-lin1, Xu Qian1, Wen Yi2, Li Hai-wen2, Hou Zheng-kun3, Mo Chuan-wei1, Liu Feng-bin3. Application of item response theory MG-Bilog software in the analysis of instrument[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(49): 7443-7448.

Figures/Tables 4

2 分析步骤 Analysis steps 安装Bilog-MG软件后，点击“file-new”，新建“bilog”的文件，见图2。Bilog-MG软件的菜单栏包括file、Edit、Setup、Data、Techincal、Save、Run、Output、View、Options、Workspace、Window和Help。 2.1 定义基本情况和分析模型 2.1.1 定义基本情况点击“Setup-General”，“Job description”用于定义基本情况。“Title”和“Commend”选项框可以空缺，也可以输入内容；本例在“Title”输入“bilog”。在“Total number of items”输入“4”，表示一共纳入4个条目，对应的语法是“> INPUT NTOTAL=4”；其他选项均使用默认的“1”。“Number of subtests”表示亚测试的数量；“Number of test form”表示测试形式的数量；“Number of examinee group”表示测试的组别，如果选定，则可以编辑“Reference group”；见图3。 2.1.2 定义分析模型点击“Model”，“Response model”包括单参数模型(1-Parameter Logistic)，双参数模型(2-Parameter Logistic)和三参数模型(3-Parameter Logistic)。本例选择单参数模型，对应的语法是“> Global NPARM=1”。“Response function metric”选择“Logistic”，表示使用Logistic公式，对应的语法是“> Global LOGISTIC”，“Special models”中选择默认的“Standard”；如果开展条目功能差异，则需要选择“Differential item functioning”，见图4。“Response”窗口用于定义条目的选项，本例的条目都是二分类(0和1)，因此在“Number of response alternative”中输入“2”，“Response codes”中输入“01”，见图5。“Label”窗口用于修改测试和条目的名字，本例采用默认的名字(TEST0001、ITEM0001等)。 2.2 定义分析条目和估计方法点击“Setup-Item analysis”，“Subtest”用于定义每个测试分析的条目，本例4个条目都在一个测试，因此在“Subtest length”中输入“4”，见图6。“Advanced”用于定义估计方法，包括收敛标准(Convergence criterion)、EM周期的最大值(Maximum number of EM cycle)、牛顿周期的最大值(Maximum number of Newton cycle)、卡方拟合统计量(Chi-square item fit statistics)、正交点的数量(Number of quadrature points)和条目限制(Prior item constraints)，本例都用默认值，见图7。 2.3 定义测试评分点击“Setup-Test scoring”，“General”用于定义测试评分的基本情况，可以定义估计方法(Method)、潜在变量的分布(Latent distributions)、导入条目参数(Import item parameter for S)、Biweight条目(Biweight items)、组别拟合统计量(Group level fit statistics)和列表评分(List scores)。本例都采用默认值。“Rescaling”用于定义重新估计得分的方法，本例不需要重新估计得分，见图8。 2.4 定义数据基本情况点击“Data-Examinee data”，“General”窗口用于定义数据的基本情况。ID号的数量(Number of case ID characters)输入“3”，对应的语法是“Input NIDCH=3”。分析样本量(Case samples)、加权(Case weights)、特定的分组(Group specific subtests)、外部能力准则和标准误(External ability criterion and standard error)都采用默认的选项，见图9。定义数据格式，点击“Data file”。点击“Data file name”中的“Browse”，选择“F:\Example”中的“Bilog.dat”文件(图1)。“Read as fixed-column record”中的“Case ID”中分别录入“1”和“3”，表示第1-3列是ID。“Response string”中分别录入“5”和“8”，表示第5-8列是条目；点击右下角的“Set format”，“Format string”选项框会出现“3A1，1X，4A1”，见图10。“Enter Data”窗口可以查看具体的数据。点击右上角的“Open”，系统会导入“F:\Example\ Bilog.dat”的数据，见图11。 2.5 定义条目的正确答案点击“Data-Item keys”，“Answer key”用于定义条目的正确答案。如果是二分类条目，“1”是默认的正确答案，这时不用定义正确答案。如果是多分类资料，只有一个正确答案，需要对答案进行定义，在“Answer key”中依次录入4个选项的答案，见图12。“Data-Group-level data”主要用于定义组别水平的数据。 2.6 保存数据保存对应的资料，点击菜单栏的“Save”，出现图13，可用于保存Bilog分析中的所有数据，默认的保存路径跟语法的路径一致。 2.7 生成语法执行程序，建立语法，点击“Run-Build syntax”，见图14。语法为： > GLOBAL DFName=’F：\Example\Bilog.dat’， NPArm=1； > LENGTH NITems=(4)；"

[1]	Zhang Tongtong, Wang Zhonghua, Wen Jie, Song Yuxin, Liu Lin. Application of three-dimensional printing model in surgical resection and reconstruction of cervical tumor [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(9): 1335-1339.
[2]	Wang Haiying, Lü Bing, Li Hui, Wang Shunyi. Posterior lumbar interbody fusion for degenerative lumbar spondylolisthesis: prediction of functional prognosis of patients based on spinopelvic parameters [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(9): 1393-1397.
[3]	Zeng Yanhua, Hao Yanlei. In vitro culture and purification of Schwann cells: a systematic review [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(7): 1135-1141.
[4]	Xu Dongzi, Zhang Ting, Ouyang Zhaolian. The global competitive situation of cardiac tissue engineering based on patent analysis [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(5): 807-812.
[5]	Wu Zijian, Hu Zhaoduan, Xie Youqiong, Wang Feng, Li Jia, Li Bocun, Cai Guowei, Peng Rui. Three-dimensional printing technology and bone tissue engineering research: literature metrology and visual analysis of research hotspots [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(4): 564-569.
[6]	Chang Wenliao, Zhao Jie, Sun Xiaoliang, Wang Kun, Wu Guofeng, Zhou Jian, Li Shuxiang, Sun Han. Material selection, theoretical design and biomimetic function of artificial periosteum [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(4): 600-606.
[7]	Liu Fei, Cui Yutao, Liu He. Advantages and problems of local antibiotic delivery system in the treatment of osteomyelitis [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(4): 614-620.
[8]	Li Xiaozhuang, Duan Hao, Wang Weizhou, Tang Zhihong, Wang Yanghao, He Fei. Application of bone tissue engineering materials in the treatment of bone defect diseases in vivo [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(4): 626-631.
[9]	Zhang Zhenkun, Li Zhe, Li Ya, Wang Yingying, Wang Yaping, Zhou Xinkui, Ma Shanshan, Guan Fangxia. Application of alginate based hydrogels/dressings in wound healing: sustained, dynamic and sequential release [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(4): 638-643.
[10]	Chen Jiana, Qiu Yanling, Nie Minhai, Liu Xuqian. Tissue engineering scaffolds in repairing oral and maxillofacial soft tissue defects [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(4): 644-650.
[11]	Xing Hao, Zhang Yonghong, Wang Dong. Advantages and disadvantages of repairing large-segment bone defect [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(3): 426-430.
[12]	Chen Siqi, Xian Debin, Xu Rongsheng, Qin Zhongjie, Zhang Lei, Xia Delin. Effects of bone marrow mesenchymal stem cells and human umbilical vein endothelial cells combined with hydroxyapatite-tricalcium phosphate scaffolds on early angiogenesis in skull defect repair in rats [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(22): 3458-3465.
[13]	Wang Hao, Chen Mingxue, Li Junkang, Luo Xujiang, Peng Liqing, Li Huo, Huang Bo, Tian Guangzhao, Liu Shuyun, Sui Xiang, Huang Jingxiang, Guo Quanyi, Lu Xiaobo. Decellularized porcine skin matrix for tissue-engineered meniscus scaffold [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(22): 3473-3478.
[14]	Mo Jianling, He Shaoru, Feng Bowen, Jian Minqiao, Zhang Xiaohui, Liu Caisheng, Liang Yijing, Liu Yumei, Chen Liang, Zhou Haiyu, Liu Yanhui. Forming prevascularized cell sheets and the expression of angiogenesis-related factors [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(22): 3479-3486.
[15]	Liu Chang, Li Datong, Liu Yuan, Kong Lingbo, Guo Rui, Yang Lixue, Hao Dingjun, He Baorong. Poor efficacy after vertebral augmentation surgery of acute symptomatic thoracolumbar osteoporotic compression fracture: relationship with bone cement, bone mineral density, and adjacent fractures [J]. Chinese Journal of Tissue Engineering Research, 2021, 25(22): 3510-3516.