During psychotherapy some patients experience large symptom improvements between sessions, termed sudden gains. Most commonly, sudden gains are observed during treatment for depression (40–50% of participants), but these are occasionally also observed in treatment for anxiety (15–20%). This study investigated the impact of comorbid depression on sudden gains in a primary anxiety sample. It was hypothesised that sudden gains would occur more frequently in participants with anxiety and comorbid depression than anxiety-only participants. The sample consisted of 58 adults who participated in a 12-week transdiagnostic cognitive-behavioural therapy (tCBT) programme. Sudden gains were more frequent in the comorbid depression group than in the anxiety-only group. Sudden gains may be predominantly a function of depressive disorders, which supports the higher rates seen in depressive disorders compared with anxiety disorders. Future research should endeavour to replicate these findings, as this was the first study designed to specifically investigate comorbidity in sudden gains.

中文翻译：

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共病抑郁症对焦虑症跨诊断认知行为治疗期间突然获益的影响

在心理治疗期间，一些患者在两次治疗之间经历了很大的症状改善，称为突然获得。最常见的是，在治疗抑郁症期间观察到突然的收益（40-50% 的参与者），但在治疗焦虑症时偶尔也会观察到这些（15-20%）。本研究调查了合并抑郁症对原发性焦虑样本突然获得的影响。据推测，与仅焦虑的参与者相比，患有焦虑症和合并抑郁症的参与者会更频繁地发生突然的收获。该样本由 58 名成年人组成，他们参加了为期 12 周的跨诊断认知行为疗法 (tCBT) 计划。共病抑郁组比仅焦虑组更频繁地突然获益。突然的收获可能主要是抑郁症的功能，这支持与焦虑症相比，抑郁症的发病率更高。未来的研究应努力复制这些发现，因为这是第一项旨在专门研究突然增加的合并症的研究。