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Facebook Recruitment Using Zip Codes to Improve Diversity in Health Research: Longitudinal Observational Study

Facebook Recruitment Using Zip Codes to Improve Diversity in Health Research: Longitudinal Observational Study

Looking at cost per advertisement click, Whitaker et al [21] reported a mean of US $0.57 across several studies (range US $0.20-US $1.74), whereas Ramo and Prochaska reported a mean of US $0.45 [35]. Our costs per advertisement click across campaigns are within this range (US $0.67, SD 0.19-US $1.56, SD 0.34). Cost per participant varies widely; Whitaker et al [21] found that the cost per participant ranged from US $1.36 to US $110.00 depending on study length and engagement.

Cornelia Ann Pechmann, Connor Phillips, Douglas Calder, Judith J. Prochaska

J Med Internet Res 2020;22(6):e17554