Cancer Prevention Research Center, Department of Psychology, University of Rhode Island, Kingston, Rhode Island 02881, USA.
Am J Health Promot. 2012 May-Jun;26(5):317-26. doi: 10.4278/ajhp.091214-QUAN-393.
African-Americans have high rates of physical inactivity-related morbidity and mortality, thus effective interventions to increase exercise are necessary. Tailored interventions show promise, but measures need validation in this population. This study validated transtheoretical model measures for exercise in an African-American sample.
Cross-sectional measure development.
Telephone survey of individuals in North Carolina.
521 African-American adults.
Stages of change, decisional balance (pros and cons), self-efficacy and processes of change (POC) for regular exercise.
Confirmatory factor analyses tested measurement models. Multivariate analyses examined relationships between each construct and stages of change.
For decisional balance, the two-factor uncorrelated model was the most parsimonious good-fitting model (χ(235) = 158.76; comparative fit index [CFI], .92; average absolute standardized residual [AASR], .04), and alphas were good (pros α = .85 and cons α = .74). The one-factor model for self-efficacy (α = .80) revealed an excellent fit (χ(29) = 45.51; CFI, .96; AASR, .03). For the POC subscales with good alphas (α = .62-.91), a 10-factor fully correlated model fit best (χ(2)[360] = 786.75; CFI, .91; AASR, .04). Multivariate analyses by stage of change replicated expected patterns for the pros, self-efficacy, and POC measures with medium-sized effects (η(2) = .05-.13). Results by stage of change did not replicate for the cons scale.
The structures of these measures replicated with good internal and external validity, except for the cons scale, which requires additional development. Results support the use of these measures in tailored interventions to increase exercise among African-Americans.
非裔美国人的身体活动相关发病率和死亡率较高，因此需要有效的干预措施来增加运动。有针对性的干预措施显示出了前景，但需要在这一人群中验证这些措施。本研究验证了跨理论模型在非裔美国人样本中对运动的测量。
横断面测量发展。
北卡罗来纳州个人的电话调查。
521 名非裔美国成年人。
改变阶段、决策平衡（利弊）、定期锻炼的自我效能和变化过程（POC）。
验证性因素分析检验了测量模型。多元分析检查了每个结构与变化阶段之间的关系。
对于决策平衡，两个因素无关联模型是最简约的拟合良好模型（χ(235) = 158.76；比较拟合指数 [CFI]，.92；平均绝对标准化残差 [AASR]，.04），并且信度良好（赞成 α =.85 和反对 α =.74）。自我效能的单因素模型（α =.80）显示出极好的拟合度（χ(29) = 45.51；CFI，.96；AASR，.03）。对于信度良好的 POC 分量（α =.62-.91），10 因素完全相关模型拟合最佳（χ(2)[360] = 786.75；CFI，.91；AASR，.04）。按变化阶段进行的多元分析复制了预期的赞成、自我效能和 POC 测量结果，效果中等（η(2) = .05-.13）。变化阶段的结果与反对量表不相符。
这些措施的结构具有良好的内部和外部有效性，除了需要进一步发展的反对量表。结果支持在针对非裔美国人的增加运动的有针对性的干预措施中使用这些措施。
