Center for Alcohol and Addiction Studies, Box G-S121-4, Brown University, Providence, RI 02912, USA.
Addict Behav. 2010 Dec;35(12):1138-43. doi: 10.1016/j.addbeh.2010.08.013. Epub 2010 Aug 13.
This study examined the correspondence of two types of Timeline Follow-back (TLFB) methods, a web-based self-administered, repeated 7-day TLFB and an interviewer-administered 30-day TLFB of alcohol consumption.
Participants were first- and second-year college students (n=323, 58.5% female). Day-to-day correspondence of drinking reports and correspondence of person-level indicators of drinking were assessed.
Results indicated that correspondence between the TLFB-30 and TLFB-7 reports was generally good for summary indicators of drinking, but TLFB-7 data indicated a statistically significantly higher number of total drinks consumed, a higher number of days drinking 4+/5+ drinks per day, and a lower number of abstinent days than TLFB-30. Similarly, day-to-day comparison of drinking reports showed that drinking days were more frequently reported using the TLFB-7, a trend which was more pronounced for distal weekdays than recent weekdays. Correlations between TLFB-7 and TLFB-30 reports of drinks per drinking day were also lower for distal compared to recent weekdays (r=0.61 vs. r=0.76). Using a Poisson regression model, a linearly increasing trend in the absolute value of the difference between TLFB-7 and TLFB-30 drinking reports per day as length of recall increases was found (b=0.013, z=4.43, with p<0.001).
Our results indicate that participants reported more drinking on the repeated TLFB-7 than on the standard TLFB-30. Furthermore, the result of daily level analyses showed that discrepancies between the methods increased as the length of recall increased. These findings suggest that TLFB assessments covering longer intervals may have reduced accuracy on a fine-grained scale.
本研究考察了两种时间线回溯(TLFB)方法的一致性,一种是基于网络的自我管理、重复的 7 天 TLFB,另一种是访谈者管理的 30 天 TLFB 酒精摄入量。
参与者为一年级和二年级大学生(n=323,58.5%为女性)。评估了每日饮酒报告的一致性和个人饮酒指标的一致性。
结果表明,TLFB-30 和 TLFB-7 报告之间的总体饮酒指标一致性良好,但 TLFB-7 数据表明,总饮酒量、每天饮酒 4+/5+饮料的天数以及戒酒天数的统计显著更高。同样,饮酒报告的每日比较表明,使用 TLFB-7 更频繁地报告饮酒日,这种趋势在远端工作日比最近工作日更为明显。TLFB-7 与 TLFB-30 报告的饮酒日之间的相关性也低于最近的工作日(r=0.61 对 r=0.76)。使用泊松回归模型,发现随着回忆长度的增加,TLFB-7 和 TLFB-30 每日饮酒量之间差异的绝对值呈线性增加趋势(b=0.013,z=4.43,p<0.001)。
我们的结果表明,参与者在重复的 TLFB-7 上报告的饮酒量多于标准的 TLFB-30。此外,每日水平分析的结果表明,随着回忆长度的增加,两种方法之间的差异增大。这些发现表明,覆盖较长时间间隔的 TLFB 评估可能会降低在细粒度尺度上的准确性。