OBJECTIVE Persistent somatic symptom distress is common in emerging adults and is associated with adverse health outcomes and impairment. Internet-based interventions could help to prevent burden and chronicity. This randomized controlled trial tested the efficacy of a guided, cognitive-behavioral internet intervention for somatic symptom distress (iSOMA) in emerging adults at risk for somatic symptom disorder compared to a waitlist control condition. METHOD 158 participants (N = 156 analyzed; 24.53 years, 83.3% female) with multiple somatic symptoms were recruited among German-speaking universities and randomly allocated to either receive the 8-week iSOMA intervention with psychologist support or the waitlist, both with access to treatment as usual. Primary outcomes were somatic symptom distress Patient Health Questionnaire, somatic symptom scale (PHQ-15) and psychobehavioral features of somatic symptom disorder-12 (SSD-12), assessed at baseline and 8-weeks postrandomization. Secondary outcomes included depression, anxiety, illness worries, functional impairment, and attitudes toward psychological treatment. RESULTS Participants in the iSOMA group showed significantly greater improvements (ps < .001) in primary outcomes (PHQ-15: d = 0.70 [0.36, 1.05], SSD-12: d = 0.65 [0.30, 0.99], and secondary outcomes (ps < .05; d = 0.41-0.52) compared to the waitlist, except for attitudes toward psychological treatment (p = .944). Satisfaction with iSOMA was high (91.0%), most participants (72.8%) completed at least 4 of 7 modules and negative treatment effects were infrequent (14.9%). CONCLUSIONS Our intervention had a substantial positive impact on somatic symptom distress across a broad range of persistent physical symptoms in a vulnerable target group, opening up promising possibilities for indicative prevention and blended care for somatic symptom disorders. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

中文翻译：

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基于互联网的 CBT 治疗新兴成人躯体症状困扰 (iSOMA)：一项随机对照试验。

目标 持续的躯体症状困扰在新兴成年人中很常见，并且与不良的健康结果和损害有关。基于互联网的干预措施有助于防止负担和长期性。这项随机对照试验测试了与候补名单控制条件相比，引导式认知行为互联网干预对有躯体症状障碍风险的新兴成年人的躯体症状困扰 (iSOMA) 的疗效。方法 158 名参与者（N = 156 名分析；24.53 岁，83.3% 女性）在德语大学中招募，并随机分配接受 8 周 iSOMA 干预（有心理学家支持）或候补名单，两者均可获得照常治疗。主要结果是躯体症状困扰患者健康问卷，躯体症状量表 (PHQ-15) 和躯体症状障碍 12 (SSD-12) 的心理行为特征，在基线和随机化后 8 周进行评估。次要结果包括抑郁、焦虑、疾病担忧、功能障碍和对心理治疗的态度。结果 iSOMA 组的参与者在主要结果（PHQ-15：d = 0.70 [0.36, 1.05]、SSD-12：d = 0.65 [0.30, 0.99] 和次要结果（ ps < .05；d = 0.41-0.52) 与候补名单相比，除了对心理治疗的态度 (p = .944)。对 iSOMA 的满意度很高 (91.0%)，大多数参与者 (72.8%) 完成了至少 4 个7 个模块和负面治疗效果不常见（14.9%）。结论 我们的干预对弱势目标群体的广泛持续身体症状的躯体症状困扰产生了实质性的积极影响，为躯体症状障碍的指示性预防和混合护理开辟了有希望的可能性。（PsycInfo 数据库记录 (c) 2022 APA，保留所有权利）。