Table 1.

Estimations of the response rate directly generated by the Survey questionnaire link over social media.

Social Media	Estimated Post Reach Size 1,2	Estimated Responses 3	Possible Response Rate (%) 5
Facebook	200,000	400	0.20
Reedit	100,000	700	0.70
Twitter	1248	68	5.45
Instagram	100	5	5.00
LinkedIn	1000	25	2.50
Email	2115 4	150 4	7.09
Google Ads	1067	12	1.12

¹ Estimated post reach sizes consider the reported views of the survey advertising post for each social media over the different targeted group of following threads related to subjects of interest (such as COVID-19 or health). ² When accurate data were not available, we considered that the post reach size was, in the better case, the third of the overall possible target (i.e., Facebook, Reedit, Instagram). ³ Responses include likes or votes, comments or replies, and sharing. ⁴ Estimated reach is based on the reports generated by an email tracking system (first mail opening by each receiver and first click on the survey’ link). ⁵ Ratio between the “estimated responses” and the “estimated post reach size”.