Related Experiment Video
Updated: Feb 15, 2026

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays
Published on: September 26, 2011
Association between depressive symptoms, CD4 count and HIV viral suppression among HIV-HCV co-infected people
Wusiman Aibibula1, Joseph Cox1,2,3, Anne-Marie Hamelin1
1a Department of Epidemiology, Biostatistics and Occupational Health , McGill University , Montreal , QC , Canada.
Insights
Depressive symptoms increase the risk of detectable HIV viral load in people with HIV-HCV co-infection. Screening for depression may improve HIV viral suppression and reduce transmission.
Area of Science:
- Medical research
- Public health
- Infectious diseases
Background:
- Depressive symptoms negatively impact HIV viral control and immune recovery.
- Previous research has not exclusively examined this link in HIV-Hepatitis C Virus (HCV) co-infection.
- HIV-HCV co-infected individuals may be more vulnerable to depressive symptoms' health effects.
Purpose of the Study:
- To assess the association between depressive symptoms and HIV viral load control.
- To investigate the impact of depressive symptoms on CD4 count in HIV-HCV co-infected individuals.
- To determine if depressive symptoms pose a risk for incomplete HIV viral suppression in this population.
Main Methods:
- Utilized data from the Canadian Co-Infection Cohort (CCC) FS Sub-Study.
- Employed a stabilized inverse probability weighted marginal structural model.
- Analyzed data from 725 participants enrolled between 2012 and 2015.
Main Results:
- 52% of participants reported depressive symptoms at baseline.
- Individuals with depressive symptoms had a 1.32 times higher risk of detectable HIV viral load.
- No significant difference in CD4 count was observed between those with and without depressive symptoms.
Conclusions:
- Depressive symptoms are a risk factor for incomplete short-term HIV viral suppression in HIV-HCV co-infected individuals.
- Screening for and counseling on depressive symptoms could enhance HIV health outcomes.
- Intervention may contribute to reduced HIV transmission rates.
Abstract:
Depressive symptoms are associated with poor HIV viral control and immune recovery among people living with HIV. However, no prior studies assessed this association exclusively among people co-infected with HIV-hepatitis C virus (HCV). While people with HIV only and those with HIV-HCV co-infection share many characteristics, co-infected people may become more susceptible to the effects of depressive symptoms on health outcomes. We assessed this association exclusively among people co-infected with HIV-HCV in Canada using data from the Food Security & HIV-HCV Sub-Study (FS Sub-Study) of the Canadian Co-Infection Cohort (CCC). Stabilized inverse probability weighted marginal structural model was used to account for potential time-varying confounders. A total of 725 participants were enrolled between 2012 and 2015. At baseline, 52% of participants reported depressive symptoms, 75% had undetectable HIV viral load, and median CD4 count was 466 (IQR 300-665). People experiencing depressive symptoms had 1.32 times (95% CI: 1.07, 1.63) the risk of having detectable HIV viral load, but had comparable CD4 count to people who did not experience depressive symptoms (fold change of CD4 = 0.96, 95% CI: 0.91, 1.03). Presence of depressive symptoms is a risk factor for incomplete short-term HIV viral suppression among people co-infected with HIV-HCV. Therefore, depressive symptoms screening and related counseling may improve HIV related health outcomes and reduce HIV transmission.
Related Concept Videos
Viral Mutations
Long-term Depression
Viral Recombination
Freezing Point Depression and Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
Depressants
Alcohol is a common depressant that can induce a sense of relaxation and reduced inhibition at low doses. Contrary to its occasional...
Depression: Overview

