Research suggests that treatment preference may affect outcome of randomized clinical trials, but few studies have assessed treatment preference in trials comparing different types of psychosocial interventions. This study used secondary data analysis to evaluate the impact of treatment preference in a randomized trial of a mindfulness-based intervention adapted for social anxiety disorder (MBI-SAD) versus cognitive behaviour group therapy (CBGT). Ninety-seven participants who met DSM-5 criteria for SAD were randomized. Prior to randomization, twice as many participants expressed a preference for the MBI-SAD over CBGT. However, being allocated or not to one's preferred treatment had no impact on treatment response. Additionally, with the exception of perception of treatment credibility, treatment matching had no impact on treatment-related variables, including treatment initiation, session attendance, homework compliance, satisfaction with treatment and perception that treatment met expectations. In sum, despite the greater preference for the mindfulness intervention in this sample of participants with SAD, we found little evidence of preference effects on our study outcomes. Findings should be viewed as preliminary and require replication.

中文翻译：

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在正念干预与认知行为疗法治疗社交焦虑症的随机试验中，治疗偏好是否会影响结果？

研究表明，治疗偏好可能会影响随机临床试验的结果，但很少有研究在比较不同类型的心理社会干预的试验中评估治疗偏好。本研究使用二次数据分析来评估治疗偏好在适用于社交焦虑症 (MBI-SAD) 与认知行为团体治疗 (CBGT) 的正念干预的随机试验中的影响。97 名符合 SAD 的 DSM-5 标准的参与者被随机分配。在随机化之前，两倍于 CBGT 的参与者表示对 MBI-SAD 的偏好。然而，是否分配到一个人的首选治疗对治疗反应没有影响。此外，除了对治疗可信度的看法外，治疗匹配对治疗相关变量没有影响，包括治疗开始、参加会议、家庭作业依从性、对治疗的满意度以及治疗达到预期的看法。总之，尽管在这个 SAD 参与者样本中更倾向于正念干预，但我们几乎没有发现偏好对我们的研究结果产生影响的证据。调查结果应被视为初步的，需要复制。