Alcohol and substance use history among ADHD adults: the relationship with persistent and remitting symptoms, personality, employment, and history of service use.

OBJECTIVE: To profile substance use, personality, service use, and employment in adults with ADHD. METHOD: The sample consisted of 216 consecutive referrals to an adult ADHD service and classified with ADHD, partially or fully remitted ADHD, or no ADHD. Normal controls (n = 33) were recruited from a general practitioner's center. Participants completed measures of alcohol and illicit substance use, employment, service use, ADHD symptoms, and personality. RESULTS: High rates of substance use were found in participants with current ADHD diagnoses. ADHD participants showed increased rates of personality trait or disorder scores and unemployment. There was some indication that those with ADHD and substance-related impairment place higher demand on services. Individuals with partially remitted ADHD showed similar substance use to those with current ADHD, whereas those in full remission were comparable with normal controls. CONCLUSION: Although ADHD symptoms may remit with time, individuals retaining persisting or partial symptoms have substantial needs in adulthood.

An fMRI investigation of posttraumatic flashbacks.

Flashbacks are a defining feature of posttraumatic stress disorder (PTSD), but there have been few studies of their neural basis. We tested predictions from a dual representation model of PTSD that, compared with ordinary episodic memories of the same traumatic event, flashbacks would be associated with activity in dorsal visual stream and related areas rather than in the medial temporal lobe. Participants with PTSD, with depression but not PTSD, and healthy controls were scanned during a recognition task with personally relevant stimuli. The contrast of flashbacks versus ordinary episodic trauma memories in PTSD was associated with increased activation in sensory and motor areas including the insula, precentral gyrus, supplementary motor area, and mid-occipital cortex. The same contrast was associated with decreased activation in the midbrain, parahippocampal gyrus, and precuneus/posterior cingulate cortex. The results were discussed in terms of theories of PTSD and dual-process models of recognition.

Rates of undiagnosed attention deficit hyperactivity disorder in London drug and alcohol detoxification units.

BACKGROUND: ADHD is a common childhood onset mental health disorder that persists into adulthood in two-thirds of cases. One of the most prevalent and impairing comorbidities of ADHD in adults are substance use disorders. We estimate rates of ADHD in patients with substance abuse disorders and delineate impairment in the co-morbid group. METHOD: Screening for ADHD followed by a research diagnostic interview in people attending in-patient drug and alcohol detoxification units. RESULTS: We estimated prevalence of undiagnosed ADHD within substance use disorder in-patients in South London around 12%. Those individuals with substance use disorders and ADHD had significantly higher self-rated impairments across several domains of daily life; and higher rates of substance abuse and alcohol consumption, suicide attempts, and depression recorded in their case records. CONCLUSIONS: This study demonstrates the high rates of untreated ADHD within substance use disorder populations and the association of ADHD in such patients with greater levels of impairment. These are likely to be a source of additional impairment to patients and represent an increased burden on clinical services.

Source memory errors associated with reports of posttraumatic flashbacks: a proof of concept study.

Flashbacks are involuntary, emotion-laden images experienced by individuals with posttraumatic stress disorder (PTSD). The qualities of flashbacks could under certain circumstances lead to source memory errors. Participants with PTSD wrote a trauma narrative and reported the experience of flashbacks. They were later presented with stimuli from flashback and non-flashback parts of their narrative, mixed with foils from the narrative of another participant, and judged whether they belonged to their own narrative. They also reported whether stimuli elicited a flashback during this recognition test. Overall reporting a flashback at test was associated with significantly better recognition performance. Flashbacks were occasionally reported to foil stimuli, which were then likely to be wrongly attributed to the person's own narrative. This provides proof of concept of a cognitive mechanism that could potentially account for some cases of false trauma memories.

Diagnostic accuracy of the Trauma Screening Questionnaire after the 2005 London bombings.

The diagnostic accuracy of screening instruments in the immediate aftermath of disaster is unknown. Following the 2005 London bombings a 2-year outreach program identified and screened affected persons. In 331 persons the accuracy of the Trauma Screening Questionnaire (TSQ) was compared to a DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition; American Psychiatric Association, 1994) diagnosis of posttraumatic stress disorder. The sensitivity of the TSQ was comparable with previous studies, but specificity was substantially lower. Specificity was lowest immediately after the bombings and rose steadily over the next 18 months. Specificity was also lower in non-White individuals, who had elevated scores on the TSQ. The data are consistent with previous research showing elevated distress in ethnic minorities following trauma, and suggest limitations on the performance of screening instruments.