Wolinsky F D, Coe R M, Chavez M N, Prendergast J M, Miller D K
Health Serv Res. 1986 Feb;20(6 Pt 2):977-90.
This paper reports on the further assessment of the reliability and validity of a short (16-item), portable method for assessing nutritional risk which is easily administered in the typical social survey setting. Data were obtained from a three-wave panel study of 401 randomly selected, noninstitutionalized elderly persons (age 65 and over) in St. Louis. Reliability was assessed by both internal consistency and test-retest methods. Reliability coefficients (internal consistency) of .603, .544, and .515 were obtained at T-1, T-2, and T-3, respectively. Cross-panel intercorrelations (test-retest) ranged between .67 and .71. Validity was assessed using factor analysis and various outcome measure comparisons for those at risk versus those not at risk. A five-factor orthogonally rotated solution explained 47.9 percent of the variance in the 16 items. Individuals with higher risk scores had significantly poorer health as measured by other standard indexes, and used significantly more health services than those with lower risk scores. These results underscore the potential of the Nutritional Risk Index (NRI) as a screening device for use among the elderly.
本文报告了一种简短（16项）、便于携带的营养风险评估方法的可靠性和有效性的进一步评估情况，该方法在典型的社会调查环境中易于实施。数据来自对圣路易斯401名随机选取的非机构化老年人（65岁及以上）进行的三轮面板研究。通过内部一致性和重测法评估可靠性。在T-1、T-2和T-3时分别获得的可靠性系数（内部一致性）为0.603、0.544和0.515。跨面板相互关联（重测）范围在0.67至0.71之间。使用因子分析以及对有风险者与无风险者的各种结果指标比较来评估有效性。一个五因子正交旋转解解释了16项指标中方差的47.9%。根据其他标准指标衡量，风险得分较高的个体健康状况明显较差，且比风险得分较低的个体使用的医疗服务显著更多。这些结果强调了营养风险指数（NRI）作为老年人筛查工具的潜力。
