Development and psychometric evaluation of the vaccine knowledge test for childhood vaccinations: using Rasch analysis.

IF 3.5 2区医学 Q1 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH

BMC Public Health Pub Date : 2025-07-14 DOI:10.1186/s12889-025-23671-7

Deniz Kocoglu-Tanyer, Deniz S Yorulmaz Demir

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Abstract

Background: There is a clear need for an up-to-date, comprehensive, and methodologically tested tool to assess parents' knowledge of childhood immunization. The aim of this study was to develop a vaccine knowledge test for childhood immunization and to evaluate its validity and reliability.

Methods: This methodological study consists of three phases: creating an item pool, preparing a draft form, and psychometric evaluation. The draft form was developed with the help of a table of specifications and expert opinions. The psychometric assessment includes classical item analysis, Rasch analysis, KR-20, Cronbach's alpha, and multiple regression analysis.

Results: The Vaccine Knowledge Test had an average item difficulty index of 0.498 and an average item discrimination index of 0.447. The WMS values of the items ranged from 0.81 to 1.14, and the UMS values ranged from 0.80 to 1.35, indicating good dispersion. The person separation index and the person number of strata of the Rasch analysis were 2.3 and 3.4. Cronbach's alpha was 0.84. It was found that receiving vaccine education, having confidence in vaccines, being a parent, and having a university education were the determinants of vaccine knowledge, and these variables accounted for 29% of the variance in vaccine knowledge.

Conclusion: The Vaccine Knowledge Test, consisting of a single dimension and 28 items, is a valid and reliable measurement tool. It can reliably discriminate between individuals with different levels of knowledge or skills as low and high. It can be used as part of public health education and programs aimed at reducing vaccine hesitancy and preventing the destructive effects of vaccine misinformation in the community.

查看原文本刊更多论文

儿童疫苗接种疫苗知识测验的发展和心理测量学评价：使用Rasch分析。

背景：显然需要一种最新的、全面的、经过方法学检验的工具来评估父母对儿童免疫接种的知识。本研究的目的是建立儿童免疫接种疫苗知识测试，并评估其效度和信度。方法：本方法学研究包括三个阶段：创建题库，准备表格草稿和心理测量评估。表格草案是在规格表和专家意见的帮助下制定的。心理测量评估包括经典项目分析、Rasch分析、KR-20、Cronbach’s alpha和多元回归分析。结果：疫苗知识测验的平均题难指数为0.498，平均题难辨别指数为0.447。项目的WMS值在0.81 ~ 1.14之间，UMS值在0.80 ~ 1.35之间，离散性较好。Rasch分析的人分离指数和层数分别为2.3和3.4。Cronbach’s alpha为0.84。研究发现，接受疫苗教育、对疫苗有信心、为人父母和受过大学教育是疫苗知识的决定因素，这些变量占疫苗知识方差的29%。结论：疫苗知识测验是一种有效、可靠的测量工具。它可以可靠地区分具有不同知识或技能水平的个体，如低水平和高水平。它可以作为公共卫生教育和计划的一部分，旨在减少疫苗犹豫和防止疫苗错误信息在社区中的破坏性影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

BMC Public Health 医学-公共卫生、环境卫生与职业卫生

CiteScore

6.50

自引率

4.40%

发文量

2108

审稿时长

1 months

期刊介绍： BMC Public Health is an open access, peer-reviewed journal that considers articles on the epidemiology of disease and the understanding of all aspects of public health. The journal has a special focus on the social determinants of health, the environmental, behavioral, and occupational correlates of health and disease, and the impact of health policies, practices and interventions on the community.