Suicidal Ideation: Investigating prevalence and its relationship to clinical outcomes in adults receiving psychological treatment for common mental health problems.

Suicidal thoughts are common among people experiencing depression and other mental health difficulties. However, relatively little is known about how suicidal thoughts affect how well psychological therapies work for people. This thesis explored this question using two related studies.
The first study reviewed existing research examining whether people with depression, who report suicidal thoughts, respond differently to psychotherapy than those who do not. Five studies involving over 3,300 participants were identified. When the findings were combined, there was no consistent evidence that suicidal thoughts were linked with worse outcomes from psychotherapy. However, the studies produced mixed results and differed substantially in their methodologies and populations. Some evidence suggested that people experiencing suicidal thoughts may remain more vulnerable to ongoing symptoms or relapse of symptoms even when they benefit from psychotherapy initially.
The second study examined routinely collected data from almost 25,000 adults who accessed NHS Talking Therapies services. Over one in three people reported experiencing suicidal thoughts when they were assessed. Suicidal thoughts were more common among people experiencing higher levels depression and anxiety symptoms, higher levels of social and work difficulties, unemployment, physical health problems, and socioeconomic deprivation. Individuals reporting suicidal thoughts were also less likely to recover or show reliable improvement during treatment and were more likely to decline treatment or discontinue therapy before completion. These findings suggest that suicidal thoughts may indicate broader clinical and social difficulties rather than just suicide risk.
These findings suggest that individuals reporting suicidal thoughts can benefit from psychological treatment and should not be excluded from treatment because of assumptions that therapy will be less effective. At the same time, suicidal thoughts may signal greater clinical complexity and additional support needs. Assessing suicidal thoughts alongside other social, physical health, and psychological difficulties may help provide more effective care.