Hlastala Michael P, Polissar Nayak L, Oberman Steven
Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Washington, Seattle, WA 98195-6522, USA.
J Forensic Sci. 2005 May;50(3):662-9.
Standardized Field Sobriety Tests (SFSTs) are used as qualitative indicators of impairment by alcohol in individuals suspected of DUI. Stuster and Burns authored a report on this testing and presented the SFSTs as being 91% accurate in predicting Blood Alcohol Concentration (BAC) as lying at or above 0.08%. Their conclusions regarding accuracy are heavily weighted by the large number of subjects with very high BAC levels. This present study re-analyzes the original data with a more complete statistical evaluation. Our evaluation indicates that the accuracy of the SFSTs depends on the BAC level and is much poorer than that indicated by Stuster and Burns. While the SFSTs may be usable for evaluating suspects for BAC, the means of evaluation must be significantly modified to represent the large degree of variability of BAC in relation to SFST test scores. The tests are likely to be mainly useful in identifying subjects with a BAC substantially greater than 0.08%. Given the moderate to high correlation of the tests with BAC, there is potential for improved application of the test after further development, including a more diverse sample of BAC levels, adjustment of the scoring system and a statistically-based method for using the SFST to predict a BAC greater than 0.08%.
标准化现场清醒度测试（SFSTs）被用作怀疑酒驾者酒精影响程度的定性指标。斯特斯特和伯恩斯撰写了一份关于此项测试的报告，并指出SFSTs在预测血液酒精浓度（BAC）处于或高于0.08%时的准确率为91%。他们关于准确率的结论在很大程度上受到大量高BAC水平受试者的影响。本研究采用更全面的统计评估方法对原始数据进行了重新分析。我们的评估表明，SFSTs的准确率取决于BAC水平，且远低于斯特斯特和伯恩斯所指出的水平。虽然SFSTs可用于评估酒驾嫌疑人的BAC，但评估方法必须进行重大修改，以体现BAC与SFST测试分数之间的巨大差异。这些测试可能主要有助于识别BAC显著高于0.08%的受试者。鉴于这些测试与BAC之间存在中度至高度相关性，在进一步开发后，包括采用更多样化的BAC水平样本、调整评分系统以及使用基于统计的方法利用SFST预测BAC高于0.08%，该测试有改进应用的潜力。
