TABLE 3.

Generalizability Considerations of Intervention Studies

Characteristic	Considerations
Recruitment site	Were participants recruited from a clinic, the general population, an opt-in from mobile network operator service, or a promotional advertisement?
Enrollment eligibility	Were inclusion/exclusion criteria generalizable to a larger population (e.g., mobile phone ownership was not required to participate in study)?
Equity	Were study findings equal across all subgroups? Did interventions reach marginalized populations? Were there trends in sharing mobile phones across some populations, which could have mediated effects?
Follow-up length	At what time point was the efficacy of an intervention assessed?
Target denominator	Was the denominator for the target population a known entity?