Increasing evidence implies a possible causal link between periodontitis and neuropsychiatric disorders, such as Alzheimer’s disease (AD) and major depression (MD). A possible mechanism underlying such a link can be explained by neuroinflammation induced by chronic systemic inflammation. This review article focuses on an overview of the biological and epidemiological evidence for a feasible causal link of periodontitis to neuropsychiatric disorders, including AD, MD, Parkinson’s disease, and schizophrenia, as well as the neurological event, ischemic stroke. If there is such a link, a broad spectrum of neuropsychiatric disorders associated with neuroinflammation could be preventable and modifiable by simple daily dealings for oral hygiene. However, the notion that periodontitis is a risk factor for neuropsychiatric disorders remains to be effectively substantiated.

The Republic of Kazakhstan has one of the world’s highest suicide rates. A detailed study of the risk factors for suicide in that country is therefore important. We investigated country-wide statistics related to labor, financial, and economic factors and whether any of these factors contribute to the risk of suicide in Kazakhstan. Using the 20 year period from 2000 to 2019, we examined the annual suicide rates overall (all citizens) and for males and females in Kazakhstan, annual unemployment rates, annual rates of increase in the country’s consumer price index, annual total exports, and annual total imports. We then calculated the correlations between the suicide rates and these four items. We also performed a multiple regression analysis of the relationship between the suicide rate and those four items. The results of these analyses indicated that the unemployment rate was the correlation coefficient most highly correlated with the suicide rate; unemployment was significantly related to suicide and should be targeted as a risk factor in suicide prevention interventions in Kazakhstan. With this in mind, organizations, government agencies, and professionals in relevant fields need to devise and implement suicide prevention measures.

Background: In the Republic of Kazakhstan, informal caregivers remain the main source of patient support. Caregivers of individuals with dementia experience an increased caregiver burden and significantly higher levels of stress. We investigated the levels of caregiver burden, depression, anxiety, and stress among informal dementia caregivers and assessed the relationships between these indicators and the caregivers’ socio-demographic characteristics. Methods: With the cooperation of two regional mental health centers and three polyclinics in Kazakhstan, we conducted a cross-sectional study of 174 informal caregivers of dementia patients. The caregiver burden was assessed using the Zarit Burden Interview, and psychological distress was measured with the Depression Anxiety Stress Scale-21. The caregivers’ sociodemographic data were collected and analyzed. The adjusted odds ratios and 95%CIs were calculated using logistic and ordinal regressions. Results: Overall, 75.9% of the caregivers reported experiencing at least a mild burden, and the levels of depression, anxiety, and stress among the caregivers were higher than expected. Spousal caregivers had higher odds of abnormal depression (p = 0.022) and anxiety (p = 0.020); in severity models, spouses more often had a severe burden (p = 0.042) and anxiety (p = 0.006). Conclusions: Caregiver burden and psychological distress are highly prevalent among informal dementia caregivers in Kazakhstan, particularly among spouses. It is especially important to provide support for spouse caregivers. Culturally tailored psychoeducation, support groups, and respite services are urgently needed to mitigate the mental health risks faced by dementia caregivers in Kazakhstan.