METHODS: A quasi-experimental study of 98 intervention and 78 control drivers selected using a cluster sampling technique was conducted. The intervention comprised a two-day training on road safety and first aid. The drivers\' knowledge of road safety was measured at baseline, immediately and 4-months post-intervention. Aggregate scores of road safety knowledge were computed giving minimum and maximum obtainable scores of 0 and 16 respectively. Change in mean scores over the three measurement periods was assessed using Repeated Measures Analysis of Variance (ANOVA). Independent t-test was used to compare the scores between intervention and control drivers at each of the assessment periods. Twenty-nine drivers did not complete the study (attrition rate = 16.5%).
RESULTS: At baseline, mean road safety knowledge scores for the intervention and control drivers were 12.7±2.2 and 12.9± 2.3 (p = 0.510) respectively. Immediately and four months post intervention, the scores of the intervention drivers were 13.8±1.9 and 12.8±1.6; while scores for the controls were 13.3±2.0 and 13.2±1.8. Repeated measures ANOVA revealed that the increase in knowledge over the three assessment periods was not statistically significant.
CONCLUSIONS: The intervention resulted in an initial increase in road safety knowledge of the intervention drivers. However, this was not sustained to the forth month post-intervention. This finding suggests periodic refresher trainings to sustain the knowledge acquired.
方法:对使用整群抽样技术选择的98个干预和78个对照驾驶员进行了准实验研究。干预包括为期两天的道路安全和急救培训。驾驶员对道路安全的知识是在基线上测量的,立即和干预后4个月。计算道路安全知识的总得分,分别给出0和16的最小和最大可得分数。使用重复测量方差分析(ANOVA)评估三个测量期间的平均得分变化。使用独立t检验来比较干预和对照驾驶员在每个评估期间的得分。29名司机没有完成研究(流失率=16.5%)。
结果:在基线时,干预和控制驾驶员的平均道路安全知识得分分别为12.7±2.2和12.9±2.3(p=0.510)。立即和干预后四个月,干预驾驶员的得分分别为13.8±1.9和12.8±1.6;而对照组的得分分别为13.3±2.0和13.2±1.8.重复测量方差分析显示,在三个评估期内,知识的增加没有统计学意义。
结论:干预措施使干预驾驶员的道路安全知识初步增加。然而,这种情况没有持续到干预后的第四个月。这一发现表明,定期进行进修培训,以维持所获得的知识。