Intervention-pathway effect parameter inputs into ECHPP HIV epidemic computer simulation.

RR: risk ratio; PEP: Post-exposure prophylaxis; STD: sexually transmitted disease; SBIRT: screening, brief intervention and referral for treatment for unhealthy alcohol use; IDU: injection drug use.
1Values of intervention effect sizes represent relative risk benefits on pathway applied to prioritized population(s) except where noted. For instance, if an intervention included a condom distribution/use component, this would result in a 12.3% increase in the probability of consistent condom usage amongst a specified risk group.
2The SBIRT intervention acts to reduce the proportion of the population classified as unhealthy alcohol users. The effect size represents the relative decrease in this proportion.
3The partner services intervention acts to identify previously unknown persons with HIV. The effect size value represents the proportion of undetected HIV positive individuals who move from the “chronic HIV” state to the “in care” state if the intervention is activated.