Publications
We work hard to attract, retain, and support the most outstanding faculty.
2017
2017
2017
2017
OBJECTIVES
The study compared health care utilization and costs among homeless veterans randomly assigned to peer mentors or usual care and described contacts with peer mentors.
METHODS
Homeless patients at four Department of Veterans Affairs clinics were randomly assigned to a peer mentor (N=195) or to usual care (N=180). Administrative data on utilization and costs over a six-month follow-up were combined with peer mentors' reports of patient contacts.
RESULTS
Most patients (87%) in the peer mentor group had at least one peer contact. Patients in this group spent the largest proportions of time discussing housing and health issues with peer mentors and had more outpatient encounters than those in usual care, although differences were not significant. No other between-group differences were found in utilization or costs.
CONCLUSIONS
Although significant impacts of peer mentors on health care patterns or costs were not detected, some patients had frequent contact with peer mentors.
View on PubMed2017
2017
2017
BACKGROUND
Hepatic steatosis is increasing worldwide. Whether HIV and its associated metabolic perturbations exacerbate steatosis is unclear. Sex differences in adipose tissue distribution may also affect steatosis risk. We examined the contribution of HIV and sex to steatosis.
METHODS
Using MRI and spectroscopy, visceral adipose tissue (VAT) and liver fat fraction (LFF) were measured in 121 HIV-infected and 107 uninfected men and women without viral hepatitis. Differences in LFF by HIV status and sex were evaluated using multivariable linear regression, adjusting for demographic, lifestyle, VAT, homeostasis model assessment-estimated insulin resistance, and HIV-related factors.
RESULTS
HIV-infected women had lower LFF than uninfected women (demographic-adjusted mean: 1.9 vs. 3.1%; P = 0.028); LFF was similar in HIV-infected and uninfected men (4.6 vs. 4.1%; P = 0.78). HIV-infected and uninfected women had less VAT than men (median: 139 and 161 vs. 201 cm and 188 cm, respectively). After adjustment, HIV-infected women had 34% [95% confidence interval (CI): -54%, -5.5%] lower LFF than uninfected women, whereas there was little difference in men (-5.5%; 95% CI: -26%, 21%). Among HIV-infected persons, greater VAT and homeostasis model assessment-estimated insulin resistance were associated with greater LFF. HIV-related factors (CD4 cell count, HIV RNA level, or antiretroviral therapy use) had little association with LFF. Although HIV-infected men had 81% (95% CI: 32%, 148%) greater LFF than HIV-infected women, the association was attenuated after multivariable adjustment (25%; 95% CI: -9.1%, 73%).
CONCLUSION
Contrary to expectation, HIV infection is not associated with greater steatosis compared with uninfected adults. It is possible that less fat is stored in the liver to maintain subcutaneous fat (which is reduced in HIV) and the effect is magnified in HIV-infected women, who also have less VAT.
View on PubMed