• 1. comparison among groups: 组间比较
• 2. comparison among many groups: 多组间比较

• 1.The measurement data in multiple groups were compared with randomized analysis of variance and the comparison among groups were performed with SNK test.
  多组间的计量资料比较采用随机分组的方差分析，组间比较采用SNK检验。
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• 2.Comparison of cognition among groups.
  各组之间认知状态比较。
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• 3.The comparison was made among the three groups in terms of the quantity of medicine, the time for the anesthesia to tade effect, the quality of anesthesia, cycle function and side effects.
  比较三组局麻药用药量，麻醉起效、完善时间，麻醉质量，循环功能变化及不良反应。
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