Department of Psychology, Cancer PreventionResearch Center, University of Rhode Island, 2 Chafee Road, Kingston, RI 02881, USA.
Am J Health Promot. 2013 May-Jun;27(5):299-307. doi: 10.4278/ajhp.110606-QUAN-240. Epub 2013 Feb 12.
Women younger than 25 years are at greatest risk for human papillomavirus (HPV) infection, including high-risk strains associated with 70% of cervical cancers. Effective model-based measures that can lead to intervention development to increase HPV vaccination rates are necessary. This study validated Transtheoretical Model measures of Decisional Balance and Self-Efficacy for seeking the HPV vaccine in a sample of female college students.
Cross-sectional measurement development. Setting. Online survey of undergraduate college students.
A total of 340 female students ages 18 to 26 years.
Stage of Change, Decisional Balance, and Self-Efficacy.
The sample was randomly split into halves for exploratory principal components analyses (PCAs), followed by confirmatory factor analyses (CFAs) to test measurement models. Multivariate analyses examined relationships between constructs.
For Decisional Balance, PCA indicated two 4-item factors (Pros -α = .90; and Cons -α = .66). CFA supported a two-factor correlated model, χ(2)(19) = 39.33; p < .01; comparative fit index (CFI) = .97; and average absolute standardized residual statistic (AASR) = .03; with Pros α = .90 and Cons α = .67. For Self-Efficacy, PCA indicated one 6-item factor (α = .84). CFA supported this structure, χ(2)(9) = 50.87; p < .05; CFI = .94; AASR = .03; and α = .90. Multivariate analyses indicated significant cross-stage differences on Pros, Cons, and Self-Efficacy in expected directions.
Findings support the internal and external validity of these measures and their use in Transtheoretical Model-tailored interventions. Stage-construct relationships suggest that reducing the Cons of vaccination may be more important for HPV than for behaviors with a true Maintenance stage.
25 岁以下的女性感染人乳头瘤病毒（HPV）的风险最高，包括与 70%宫颈癌相关的高危型 HPV。有必要采取有效的基于模型的措施，以促使开发干预措施，提高 HPV 疫苗接种率。本研究验证了在一组女大学生中，使用跨理论模型来衡量对 HPV 疫苗的决策平衡和自我效能。
横断面测量开发。设置。对本科大学生进行在线调查。
年龄在 18 至 26 岁之间的 340 名女性学生。
阶段变化、决策平衡和自我效能。
将样本随机分为两半进行探索性主成分分析（PCA），然后进行验证性因素分析（CFA），以测试测量模型。多变量分析检查了各结构之间的关系。
对于决策平衡，PCA 表明存在两个 4 项因素（Pros -α =.90；Cons -α =.66）。CFA 支持一个两因素相关模型，χ(2)(19) = 39.33；p <.01；比较拟合指数（CFI）=.97；和平均绝对标准化残差统计量（AASR）=.03；其中 Pros α =.90，Cons α =.67。对于自我效能，PCA 表明存在一个 6 项因素（α =.84）。CFA 支持该结构，χ(2)(9) = 50.87；p <.05；CFI =.94；AASR =.03；和 α =.90。多变量分析表明，在预期方向上，各阶段之间的 Pros、Cons 和自我效能存在显著差异。
研究结果支持这些措施的内部和外部有效性，以及它们在跨理论模型定制干预中的应用。阶段结构关系表明，与具有真正维持阶段的行为相比，减少接种疫苗的 Cons 可能对 HPV 更为重要。
