Table 3.

Data sources for parameterization of a model of HIV transmission dynamics among MSM in Atlanta, GA, and Seattle, WA.

Parameters	Atlanta Data Sources	Seattle Data Sources
Testing and treatment	InvolveMENt [65,72-74]	Medical Monitoring Project [75,76], HIV Surveillance [62,77]
Tester type	AMISa [7,69,71], Man Project [68], InvolveMENt [65]	Seattle Pride Survey [63]
Mean interval between tests among regular testers	PUMAb Survey [70]	Seattle Pride Survey [63]
Likelihood of seizing the testing opportunity for risk-based, regular, and opportunity-only testers	Internet Ethics and Incentives Study [78], American Men's Internet Survey [7,69,71]	Internet Ethics and Incentives Study [78], Seattle Pride Survey [63]
Risk-based testing: the likelihood of testing after event and time from event to test	American Men's Internet Survey [7,69,71]	American Men's Internet Survey [7,69,71]
Sexual behavior (ie, versatility, condom use, disclosure); sexual network attributes	Man Project [68], InvolveMENt [65]	Mobile Study (S. Cassels, Personal Communication, November 2017)
Prevalence of circumcision	InvolveMENt [65]	National HIV Behavioral Surveillance [66,79,80]
PrEP coverage	PUMA Survey [70]	Washington HIV Prevention Project
Expected coital frequency within partnerships	PUMA Survey [70]	Washington HIV Prevention Project
Racial or ethnic distribution of MSM for weighting parameters estimates	Goodreau et al [30]	King County Population Estimates [81]
CCR5-Δ32 prevalence	Marmor et al [82]	Zimmerman et al [41] and Marmor et al [82]

^aAMIS: Annual American Men’s Internet Survey of Behaviors of Men who have Sex with Men in the United States.

^bPUMA: Prevention Umbrella for MSM in the Americas.