Connecting the dots: a comparison of network analysis and exploratory factor analysis to examine psychosocial syndemic indicators among HIV-negative sexual minority men.

Syndemics, or comorbid and mutually reinforcing psychosocial problems, are associated with increased HIV risk among men who have sex with men (MSM). Although the dynamic interplay among syndemic indicators is theorized to be crucial for increasing risk of HIV acquisition, novel approaches are needed to understand how these syndemic problems interrelate. This study examined the associations between nine self-reported syndemic indicators in 194 MSM at high risk of HIV acquisition. We compared exploratory factor analyses (EFA) to a network analysis. In the present study, network analysis consisted of edges representing bidirectional partial polychoric correlations between nodes, which represent psychosocial syndemic indicators. EFA yielded a 1-factor solution including suicidal ideation (SI), injection drug use (IDU), depression, social anxiety, intimate partner violence, substance use, and sexual compulsivity, and excluded heavy drinking and childhood sexual abuse. Network analysis yielded a pattern of interconnectedness with the most central nodes being SI, IDU, substance use, and depression. Statistically significant relationships (absolute edge weights) were found between SI and depression, social anxiety, and IDU, and IDU and substance use. These results suggest that depression and substance use, especially more severe presentations of these conditions such as SI and IDU, are prominent interconnected components of the HIV syndemic among MSM at high risk for HIV acquisition. SI, IDU, substance use, and depression may indeed be prudent targets of intervention. Future research on the inclusion of these syndemic indicators in analytical models involving interaction terms may be warranted.

Addressing Syndemics and Self-care in Individuals with Uncontrolled HIV: An Open Trial of a Transdiagnostic Treatment.

Interventions addressing syndemics and ART adherence are needed for individuals with uncontrolled HIV and psychosocial problems. Twenty-seven participants with detectable HIV plasma viral load (PVL) or recent STI participated in an open trial of transdiagnostic adherence counseling and cognitive behavioral therapy. Outcomes were collected at baseline, 4-, and 8-months. Log PVL improved from baseline to 4-month (γ = - 1.13, 95% CI - 1.72, - 0.55, p < 0.001) and 8-month (γ = - 0.93, 95% CI - 1.57, - 0.30, p = 0.006), with more participants suppressed at 4- (χ2(1) = 9.09, p = 0.001) and 8-month (χ2(1) = 5.14, p = 0.016). Self-reported adherence improved across major assessments (γ = 0.87, 95% CI 0.28, 1.46, p = .005); Wisepill adherence did not. Negative affect declined during treatment (γ = - 0.28, 95% CI - 0.40, - 0.16, p < 0.001), with improvement at 4- (γ = - 4.34, 95% CI - 6.99, - 1.69, p = 0.002) but not 8-month. Positive affect trended positively during treatment and from baseline to 4-month, with significant 8-month improvement (γ = 3.84, 95% CI 0.33, 7.44, p = 0.04). Depressive symptoms did not change. In a complicated sample of participants selected for uncontrolled HIV, the intervention yielded improved PVL and self-reported adherence. Efforts to end HIV should improve upon strategies such as these, addressing syndemics. Registration: clinicaltrial.gov: NCT02696681.

An in vivo model for epithelialization kinetics in human skin.

Epithelialization of wounds has been difficult to measure objectively due to the lack of an adequate model. This paper presents a model for the investigation of epithelialization kinetics in human skin using athymic (nude) rats as an in vivo vehicle. Nude rats are T-cell depleted and as such tolerate xenografts. This technique allows an epithelialization rate for a graft to be calculated by plotting the percentage of its designated analysis area to be closed by neoepithelium over time. This model provides a tool whereby the effect of various agents on the epithelialization kinetics of human skin can be objectively and reproducibly examined. This information may be usefully applied to the clinical management of wounds.

Body composition of mice following exposure to 4300 and 6100 meters.

Male Swiss mice were exposed for 3 and 7 d to simulated altitudes of 4300 and 6100 m. Body weight losses were enhanced at the higher elevation and after longer exposure at each elevation. Carcass analyses showed the weight losses to be attributable to decrements in body water and fat content. The water decrements were a little greater than the fat decrements after all exposure conditions. At both elevations, however, fat loss increased significantly as exposure was extended from 3 to 7 d whereas water loss remained unchanged.