Prevalence of mental health conditions among people living with HIV during the COVID-19 pandemic: A rapid systematic review and meta-analysis.

BACKGROUND: The COVID-19 pandemic has generated many mental health problems worldwide. People living with HIV (henceforth known as PLHIV) bear a higher mental health burden in comparison with the general population. Therefore, their risk of mental health problems may be elevated during the pandemic. METHODS: We conducted a systematic review and meta-analysis to assess the prevalence of depression, anxiety, psychological stress, insomnia and loneliness among PLHIV during the COVID-19 pandemic. Observational studies in four databases published from 1 January 2020 to 30 April 2021 investigating the prevalence of mental health conditions during the COVID-19 pandemic were searched, and 197 articles were retrieved. After the processes of duplication removal, eligibility screening and full-text assessment, 10 articles were included in the systematic review and six articles for meta-analyses. A random-effects model was applied to derive the pooled prevalence of mental health conditions. The risk of bias was assessed using the STROBE checklist. RESULTS: Overall, the pooled prevalence rates of (moderate-to-severe) depression and anxiety among PLHIV were 16.9% [95% confidence interval (CI): 3.8%-30.0%] and 23.0% (95% CI: 12.0%-34.0%), respectively. CONCLUSIONS: More research is needed to investigate the mechanism by which the pandemic affects the mental health of PLHIV. Support and programmes are needed to ameliorate the mental health problems in this marginalized population.

Ginseng and Ginkgo Biloba Effects on Cognition as Modulated by Cardiovascular Reactivity: A Randomised Trial.

BACKGROUND: There is some evidence to suggest that ginseng and Ginkgo biloba can improve cognitive performance, however, very little is known about the mechanisms associated with such improvement. Here, we tested whether cardiovascular reactivity to a task is associated with cognitive improvement. METHODOLOGY/PRINCIPAL FINDINGS: Using a double-blind, placebo controlled, crossover design, participants (N = 24) received two doses of Panax Ginseng (500, 1000 mg) or Ginkgo Biloba (120, 240 mg) (N = 24), and underwent a series of cognitive tests while systolic, diastolic, and heart rate readings were taken. Ginkgo Biloba improved aspects of executive functioning (Stroop and Berg tasks) in females but not in males. Ginseng had no effect on cognition. Ginkgo biloba in females reversed the initial (i.e. placebo) increase in cardiovascular reactivity (systolic and diastolic readings increased compared to baseline) to cognitive tasks. This effect (reversal) was most notable after those tasks (Stroop and Iowa) that elicited the greatest cardiovascular reactivity during placebo. In males, although ginkgo also decreased cardiovascular readings, it did so from an initial (placebo) blunted response (i.e. decrease or no change from baseline) to cognitive tasks. Ginseng, on the contrary, increased cardiovascular readings compared to placebo. CONCLUSIONS/SIGNIFICANCE: These results suggest that cardiovascular reactivity may be a mechanism by which ginkgo but not ginseng, in females is associated with certain forms of cognitive improvement. TRIAL REGISTRATION: ClinicalTrials.gov NCT02386852.