如作者未说明该试验是否采用随机分配，而读者不能排除其随机分配的可能，则将之归为CCT(临床对照试验)。
If the author (s) do not state explicitly that the trial was randomized, but randomization cannot be ruled out, the report is classified as a 'CCT' (controlled clinical trial).
高质量的随机对照临床试验均未检测以患者为中心的结局指标，如健康相关生命质量、糖尿病并发症及死亡率等。
Many patient-oriented outcomes like health-related quality of life or diabetes complications and mortality were never investigated in high-quality randomised clinical trials.
高质量的随机对照临床试验均未检测以患者为中心的结局指标，如健康相关生命质量、糖尿病并发症及死亡率等。
Many patient-oriented outcomes like health-related quality of life or diabetes complications and mortality were never investigated in high-quality randomised clinical trials.
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