Although it is well established that HIV-related stigma, depression, and
lack of social support are negatively associated with health-related quality of
life (HRQoL) among people living with HIV (PLH), no studies to date have
examined how these psychosocial factors interact with each other and affect
HRQoL among incarcerated PLH. We, therefore, incorporated a moderated mediation
model (MMM) to explore whether depression mediates the effect of HIV-related
stigma on HRQoL as a function of the underlying level of social support.
Incarcerated HIV-infected men with opioid dependence (N=301) were
recruited from the HIV units in Kajang prison in Malaysia. Participants
completed surveys assessing demographic characteristics, HIV-related stigma,
depression, social support, and HRQoL. Results showed that the effect of
HIV-related stigma on HRQoL was mediated via depression
(a1:β=0.1463, p<0.001;
b1:β=−0.8392, p<0.001), as demonstrated
by the two-tailed significance test (Sobel z=−3.8762,
p<0.001). Furthermore, the association between social support
and HRQoL was positive (β=0.4352,
p=0.0433), whereas the interaction between HIV-related
stigma and depression was negatively associated with HRQOL
(β=−0.0317, p=0.0133). This
indicated that the predicted influence of HIV-related stigma on HRQoL via
depression had negative effect on HRQoL for individuals with low social support.
The results suggest that social support can buffer the negative impact of
depression on HRQoL and highlights the need for future interventions to target
these psychosocial factors in order to improve HRQoL among incarcerated PLH.