摘要目的 探讨明暗箱穿梭试验(LDB)作为小鼠状态焦虑动物模型评价方法的重测信度及其参数相关性.方法 成年雄性昆明小鼠放入明暗穿梭箱,摄像系统记录5 min的行为变化,试验间隔1周进行2次;通过组内相关系数(ICC)、Kappa一致系数(Kappa)和Pearson相关系数(Pearson)进行统计分析,实验参数如下:首次进入暗箱潜伏期、明区停留时间百分率、明区水平运动百分率、总水平运动得分、明区垂直运动百分率、总垂直运动得分、总得分、穿梭次数及粪便粒数.结果 ①ICC结果表明,仅总垂直运动得分(ICC=0.5207,P＜0.01)显示LDB重测信度尚可接受,穿梭次数参数亦可考虑(ICC=0.4731,P＜0.05),而其他参数均显示LDB重测信度较差.②Kappa结果表明,所有参数均显示LDB重测信度较差,其中总垂直运动得分参数尚可考虑(Kappa=0.4286,P＜0.01).③Pearson结果表明,穿梭次数与明区停留时间百分率(Pearson=-0.4030,P＜0.05;Pearson=-0.1490,P＞0.05)、明区水平运动百分率(Pearson=-0.4331,P＞0.05;Pearson=-0.1893,P＞0.05)、明区垂直运动百分率(Pearson=-0.4485,P＜0.05;Pearson=0.02845,P＞0.05)初测重测几乎均呈弱负相关,与总水平运动得分(Pearson=0.8603,P＜0.01;Pearson=0.6341,P＜0.01)、总垂直运动得分(Pearson=0.4271,P＞0.05;Pearson=0.7245,P＜0.001)初测重测呈较好正相关.结论 总垂直运动得分可以作为昆明小鼠LDB的一个稳定参数,具有较好的重测信度;穿梭次数与明区停留时间百分率、明区水平运动百分率、明区垂直运动百分率初测重测呈弱负相关,与总水平运动得分、总垂直运动得分初测重测呈较好正相关.

abstractsObjective To explore the test-retest reliability and correlations of the light-dark box (LDB).Methods The behavior of mice in LDB was recorded twice, for five minutes,with a one-week inter-trial interval.Following parameters were evaluated:latency time for the first entry into the dark area (Latence); percentage of time exploring in the light area ( Ltime％ ); percentage of squares crossing in the light area ( Lcross％ ); total number of squares crossing ( Cross ); percentage of rears in the light area ( Lrear％ ); total number of rears (Rear); total score (Total); transitions between two areas (Transition); and number of fecal boli (Fbi). Subsequently,the intraclass correlation coefficient (ICC), the Kappa agreement coefficient (Kappa) and the Pearson correlation coefficient (Pearson) were calculated for these parameters. Results ①ICC for Lrear％ ( ICC =0.5207, P＜0.01 ) showed a fair reliability. ②Kappa for all parameters indicated a poor reliability. ③Pearson displayed weak negative correlations between Transition and Ltime％ ( Pearson = - 0.4030, P ＜ 0.05; Pearson =- 0. 1490, P＞ 0. 05 ), Lcross％ ( Pearson = - 0. 4331, P ＞ 0. 05; Pearson = - 0.1893, P ＞ 0.05 ), Lrear％ ( Pearson = - 0. 4485, P ＜ 0. 05; Pearson = 0. 02845, P ＞ 0. 05 ), however, fair positive correlations between Transition and Cross (Pearson =0. 8603, P＜0.01; Pearson =0.6341, P＜0. 01 ) ,Rear(Pearson =0.4271, P＞0. 05;Pearson = 0. 7245, P ＜ 0. 001 ). Conclusion Rear is found to be stable over time, and indicated a fair reliability.There is a weak negative correlation between Transition and Ltime％, Lcross％, Lrear％, but fair positive correlations between Transition and Cross, Rear.