Clinical estimation of fetal weight and the Hawthorne effect
Clinical estimation of fetal weight and the Hawthorne effect
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DOI：
10.1016/j.ejogrb.2008.07.023
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发表时间：
2008-12-01
影响因子：
2.6
通讯作者：
Chasen, Stephen T.
中科院分区：
文献类型：
--
作者：
Fox, Nathan S.;Brennan, Jennifer S.;Chasen, Stephen T.
目的：霍桑效应指的是仅仅由于受试者知道他或她正在接受研究而导致的表现改善。我们试图确定产科医生的临床估计胎儿体重（EFW）的影响，霍桑效应在一些临床试验design.Study：我们比较了产科医生的临床EFW的研究期间获得的研究期间之前，在一个机构。我们纳入了任何妊娠≥ 37周的患者。我们排除了多胎妊娠和近期超声检查有EFW的患者。EFW在出生体重10%以内的比例没有差异（67.9% vs. 68.5%，p = 0.91），EFW-出生体重的平均绝对差（282 227 g vs. 285 232 g，p = .88）或平均绝对百分比误差（8.5 +/- 7.4% vs. 8.6 +/-7.2%，p = .96）。我们也没有发现任何霍桑效应时，我们排除住院医师的EFW的，当我们分析的新生儿亚组出生体重>= 4000 g。结论：产科医生的知识，谎言或她正在研究是不可能提高临床EFW的准确性。已发表的临床EFW准确度可能与临床实践中获得的准确度相似。(C)2008爱思唯尔爱尔兰有限公司保留所有权利。
Objective: The Hawthorne effect refers to improvement in performance solely due to the subject's knowledge that he or she is being Studied. We sought to determine if an obstetrician's clinical estimation of fetal weight (EFW) is influenced by the Hawthorne effect seen in some clinical trials.Study design: We compared obstetricians' clinical EFW's obtained during a study period to those obtained prior to the study period in one institution. We included any patient presenting at >= 37 weeks gestation. We excluded multiple pregnancies and patients with a recent sonographic EFW.Results: There was no difference in regards to the proportion of EFW's within 10% of the birthweight (67.9% vs. 68.5%, p = .91), the mean absolute difference of EFW-birthweight (282 227 g vs. 285 232 g, p = .88), or the mean absolute percent error (8.5 +/- 7.4% vs. 8.6 +/- 7.2%, p = .96). We also could not find any Hawthorne effect when we excluded resident physicians' EFW's and when we analyzed the subgroup of newborns with a birth weight >= 4000 g.Conclusion: An obstetrician's knowledge that lie or she is being studied is unlikely to improve clinical EFW accuracy. Published clinical EFW accuracies are likely to be similar to those obtained in clinical practice. (C) 2008 Elsevier Ireland Ltd. All rights reserved.