Searles John S, Helzer John E, Rose Gail L, Badger Gary J
Department of Psychiatry, Health Behavior Research Center, University of Vermont, South Burlington 05403, USA.
J Stud Alcohol. 2002 May;63(3):352-62. doi: 10.15288/jsa.2002.63.352.
To compare near-concurrent and retrospective reports of alcohol consumption and to determine whether a simple adjustment function could be applied to the retrospective reports to correct any distortions in reporting.
Reports of daily alcohol consumption collected via an Interactive Voice Response (IVR) system were aggregated over 30, 90 and 366 days and compared with the corresponding retrospective reports gathered with the Timeline Follow Back (TLFB). Comparisons of the IVR and TLFB reports for five consumption variables were made for each time period for 33 men.
Significant differences between reporting methods were found for four of the five variables tested. On average, the TLFB yielded an underestimate of alcohol consumption compared to the IVR. This underestimate associated with TLFB reports was not dependent on the length of the recall period. Regression analyses indicated that the relationship between the two modalities of reporting was dependent on the quantity of drinks reported, thus precluding the application of a simple, linear metric to the TLFB data to model near real-time daily data obtained through the IVR more accurately.
The retrospective TLFB consistently and significantly underestimated alcohol consumption compared to the aggregated daily reports. This underestimate, however, was stable across the three reporting periods. With one exception, no simple linear function could be applied to the retrospective TLFB consumption reports to more accurately reflect the IVR data gathered daily. Evidence presented here also suggests that underreporting on the TLFB is not simply a matter of consciously attempting to conceal consumption.
比较近期同时期和回顾性饮酒报告，并确定是否可以对回顾性报告应用简单的调整函数来纠正报告中的任何偏差。
通过交互式语音应答（IVR）系统收集的每日饮酒报告在30天、90天和366天内进行汇总，并与通过时间线追溯法（TLFB）收集的相应回顾性报告进行比较。对33名男性在每个时间段内的IVR和TLFB报告的五个饮酒变量进行了比较。
在测试的五个变量中的四个变量上，发现报告方法之间存在显著差异。平均而言，与IVR相比，TLFB得出的饮酒量估计值偏低。与TLFB报告相关的这种低估并不取决于回忆期的长度。回归分析表明，两种报告方式之间的关系取决于报告的饮酒量，因此无法对TLFB数据应用简单的线性度量来更准确地模拟通过IVR获得的近实时每日数据。
与汇总的每日报告相比，回顾性的TLFB持续且显著地低估了饮酒量。然而，这种低估在三个报告期内是稳定的。除了一个例外，无法对回顾性的TLFB饮酒报告应用简单的线性函数来更准确地反映每日收集的IVR数据。此处提供的证据还表明，TLFB报告中的少报不仅仅是有意识地试图隐瞒饮酒量的问题。
