提供一篇医学论文的摘要，在500个单词以内，并将其翻译成中文。
Title: The effectiveness of a cognitive behavioral therapy-based self-help intervention for anxiety in Chinese college students: a randomized controlled trial.

Abstract: 

Background: Anxiety is a common mental health problem among college students in China, but few effective interventions are available. Cognitive behavioral therapy (CBT) has been shown to be effective for the treatment of anxiety disorders in Western countries. However, few studies have examined the effectiveness of self-help CBT interventions for anxiety in Chinese college students.

Methods: We conducted a randomized controlled trial to evaluate the effectiveness of a self-help CBT intervention for anxiety in Chinese college students. Participants were randomly assigned to either a self-help CBT program (n = 70) or a waitlist control group (n = 70). The self-help CBT program consisted of a workbook and audio recordings, and participants were encouraged to complete the program over a period of 6 weeks. The primary outcome was anxiety symptom severity as measured by the Generalized Anxiety Disorder-7 scale (GAD-7) at post-intervention and 3-month follow-up.

Results: Participants in the self-help CBT group showed significantly greater reductions in anxiety symptoms at post-intervention (d = 0.62, 95% CI [0.24, 1.00], p = 0.002) and at 3-month follow-up (d = 0.53, 95% CI [0.14, 0.93], p = 0.009) compared to the control group. The self-help CBT program was also associated with improvements in depression symptoms, quality of life, and self-esteem.

Conclusions: Our findings suggest that a self-help CBT intervention may be an effective and accessible intervention for anxiety in Chinese college students. The program evaluated in this trial was low-cost and could be easily disseminated to large numbers of students. 

翻译：

标题：基于认知行为疗法和自助干预的中国大学生焦虑症状的有效性：一项随机对照试验。

摘要：

背景：焦虑症在中国大学生中是常见的心理健康问题，但有效的干预方案较少。认知行为疗法(CBT)已被证明在西方国家治疗焦虑障碍有效。然而，很少有研究考虑到对中国大学生的焦虑自助CBT干预的有效性。

方法：我们进行了一项随机控制试验，以评估CBT自助干预对中国大学生焦虑症状的有效性。研究对象随机分配到自助CBT组（n = 70）或等待对照组（n = 70）。自助CBT程序包括一本工作手册和音频记录，鼓励参与者在6周内完成该程序。主要结果是焦虑症状的严重程度，由广泛焦虑障碍7项量表（GAD-7）在干预后和3个月后进行评估。

结果：自助CBT组参与者在干预后焦虑症状显著减轻（d = 0.62，95% CI [0.24，1.00]，p = 0.002），且在3个月的随访中仍然有效（d = 0.53，95% CI [0.14，0.93]，p = 0.009），与对照组相比。自助CBT程序还具有改善抑郁症状，生活质量和自尊心的作用。

结论：我们的结果表明，自助CBT干预可能是中国大学生焦虑的一种有效和可行的方法。本试验评估的程序成本低廉，易于向大量学生推广。