Department of Community Health Sciences, Boston University School of Public Health, Boston, Massachusetts, United States of America.
Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America.
PLoS One. 2018 Oct 24;13(10):e0204678. doi: 10.1371/journal.pone.0204678. eCollection 2018.
To develop and validate a Weight Literacy Scale in English and Spanish for adults.
The two-phase study utilized quantitative and qualitative methods. Phase 1 of the study consisted of developing an initial survey (English and Spanish versions) assessing weight literacy based on a review of the literature; conducting semi-structured interviews with content experts (N = 9) to refine survey items; and conducting in-person cognitive interviews with 20 study participants (N = 10 English-speaking and N = 10 Spanish-speaking adults) for survey pre-testing. Survey items were modified based on Phase 1 findings. Phase 2 consisted of a psychometric study of the Weight Literacy Scale developed in Phase 1. Procedures included administering the Weight Literacy Scale to 200 study participants (N = 100 English-speaking and N = 100 Spanish-speaking adults), a quantitative survey assessing dietary and physical activity behaviors and sociodemographics, measuring participants' height and weight, and assessing the scale's validity and internal reliability. A subset of Phase 2 participants (N = 71) completed the weight literacy scale at two-weeks follow-up to assess test-retest reliability. Participant recruitment and study procedures took place in community settings in central Massachusetts for both study phases. Weight literacy scale scores were calculated as the sum of total correct items. Three rounds of factor analysis were performed to identify items for elimination. The Kuder Richardson's Coefficient of reliability was calculated. Correlations between the Weight Literacy Scale scores and related measures (body mass index and weight status, dietary behaviors, physical activity behaviors, and confidence in filling out medical forms) were examined.
The final scale included 31 items and demonstrated strong internal consistency (Kuder Richardson Coefficient = 0.90), reasonable construct validity, and acceptable test-retest reliability (ρ = 0.72).
The Weight Literacy Scale is a reliable and valid research instrument to assess weight literacy among English- and Spanish-speaking adults.
开发并验证成人英文和西班牙文的体重素养量表。
该两阶段研究采用定量和定性方法。研究的第一阶段包括开发一个初步调查（英文和西班牙文版本），根据文献回顾评估体重素养；对 9 位内容专家进行半结构化访谈，以完善调查项目；并对 20 名研究参与者（10 名英语和 10 名西班牙语成年人）进行面对面认知访谈，进行调查预测试。根据第一阶段的研究结果对调查项目进行了修改。第二阶段包括对第一阶段开发的体重素养量表进行心理测量研究。程序包括对 200 名研究参与者（100 名英语和 100 名西班牙语成年人）进行体重素养量表的施测，一个评估饮食和身体活动行为以及社会人口统计学的定量调查，测量参与者的身高和体重，以及评估量表的效度和内部可靠性。第二阶段的一部分参与者（N=71）在两周后完成体重素养量表的复测，以评估测试-重测信度。两个研究阶段的参与者招募和研究程序均在马萨诸塞州中部的社区环境中进行。体重素养量表的分数是通过计算正确回答的总题数来计算的。进行了三轮因子分析，以确定需要删除的项目。计算了 Kuder-Richardson 可靠性系数。检查了体重素养量表得分与相关测量指标（体重指数和体重状况、饮食行为、身体活动行为以及填写医疗表格的信心）之间的相关性。
最终量表包括 31 个项目，具有很强的内部一致性（Kuder-Richardson 系数=0.90）、合理的结构有效性和可接受的测试-重测信度（ρ=0.72）。
体重素养量表是一种可靠且有效的研究工具，可用于评估英语和西班牙语成人的体重素养。
