Risk Factors of a Suicide Reattempt by Seasonality and the Method of a Previous Suicide Attempt: A Cohort Study in a Japanese Primary Care Hospital

Suicide has a great impact on the individual whose life is lost and the bereaved family members. The risk of a suicide reattempt is particularly high during the first 12 months after a suicide attempt. In this cohort study, risk factors for a suicide reattempt were explored among 291 patients at suicide risk. Clinical and demographic data were collected from a Japanese primary care hospital. Past psychiatric history and multiple diagnoses were associated with suicide reattempts in both genders. Drug overdose, past psychiatric history, and the summer season were linked to suicide reattempts among males. Past psychiatric history and multiple diagnoses were linked to suicide reattempts among females. Appropriate assessment of past psychiatric history, season and method of suicide attempt, gender, and diagnosis may play a role in preventing suicide.     

Postdeployment Suicide Risk Increases Over a 6‐month Period: Predictors of Increased Risk among Midwestern Army National Guard Soldiers

National Guard (NG) soldiers returning from deployments in Iraq and Afghanistan were surveyed at 6 and 12 months following their return (N = 970). The overall prevalence of suicide risk at 6 and 12 months following their return was assessed, as were changes in suicide risk among soldiers initially at high or low risk. Factors associated with changes in risk were assessed. The percentage of NG soldiers with high suicide risk increased from 6.8% at 6 months to 9.2% at 12 months (odds ratio = 1.7, p = .02). In the 882 soldiers initially at low risk, 5.9% (52/882) became high risk at 12 months; in the 64 soldiers initially at high risk, 46.9% (30/64) became low risk at 12 months. Initial levels of depressive symptoms were predictive of changing to high risk; this association appeared to be partially explained by soldier reports of increased search in the meaning in life and higher levels of perceived stress. Because suicide risk increases over the first 12 months, continued risk assessments during this time period should be considered. Supporting soldiers to find meaning in their life after deployment and enhancing their capacity to cope with perceived stress may help prevent increases in suicide risk over time.     

Friendship,Depression, and Suicide Attempts in Adults: Exploratory Analysis of a Longitudinal Follow‐Up Study

Social support is thought to protect against the risk of suicidal behavior in young people and late life, but less is known about the role of friendship in adults. We explored the effect of friendship on suicide attempt risk during 1‐year follow‐up of 132 adults presenting with major depressive episode (MDE). Items from the Social Adjustment Scale–Self‐Report were used as an index of frequency and quality of recent friendship contacts. Survival methods tested associations of friendship with risk of suicide attempt, recurrent MDE, and related outcomes during follow‐up. Impaired friendship predicted greater risk of suicide attempt in an unadjusted Cox model. This association was stronger for quality (p = .009) than frequency (p = .081) of friendship contacts. In the adjusted model, the effect of friendship on suicide attempts was largely explained by self‐reported depression severity. Friendship has a potentially bidirectional relationship with depression, and its effect on suicidal behavior appears to occur through its relationship with depression. Future research should examine the effect of antidepressant treatment on friendship and be designed to test mediation models of relationships between friendship, depression, and suicidal behavior.     

The Contribution of Neuroimaging to the Study of Language and Aphasia

New structural and functional imaging methods continue to be developed at a rapid pace. In the last 25 years, advanced imaging techniques have provided insights into how language is represented and processed in the brain and how it can be disrupted by damage to, or dysfunction of, various parts of the brain. Imaging studies have also yielded new information regarding how individuals recover language after stroke. We briefly review the strengths and weaknesses of the various radiological methods currently used to study language and aphasia.     

Time-dependent effects of post-trial amphetamine treatment in rats: evidence for enhanced storage of representational memory

Two studies were conducted to test the ability of post-trial amphetamine treatment to improve later recall in a nonaversively motivated task. These studies utilized 8- and 12-arm radial mazes, respectively, with an 11-h retention interval imposed after the rat traversed half the arms of the maze (termed, the to-be-remembered-event, or TBRE). In Experiment 1, the rats were injected with amphetamine (0, .25, and .50 mg/kg) immediately after the TBRE. Because the drug treatment improved retention, a time dependency study was conducted in which the drug (0 and .33 mg/kg) was administered 0, 3, and 6 h after the TBRE. The finding that amphetamine injection at 0, but not 3, h post-trial improved later recall indicates that the benefit derived from the former treatment is not due to proactive influences at the time of the retention test. Drug treatment 6 h post-trial produced a borderline improvement of recall; possible mechanisms are discussed. Two conclusions can be drawn from these results: (1) amphetamine administration can improve recall under conditions in which this effect cannot be attributed to alterations in information processing during either the learning or the retention sessions, indicating that the drug modulates memory storage processes; and (2) amphetamine treatment can improve working memory, thus excluding an alternative interpretation for the previous reports of impaired short-term memory in animals, all of which entailed assessments of working memory. The possibility remains, however, that the impairment seen in these tasks reflects the requirement for erasure of information from previous trials within each daily session, rather than the duration of the retention interval.