Table 1.

Description of six likelihood formats – In each case (except Consumer Medication Information (CMI)), a table similar to that in Figure 1 was provided. Differences from Figure 1 are noted under the format description

Format type	Format	Format description
Non-numeric	CMI-like list (CMI)	Instead of the table, the CMI list included this text: “Possible Side Effects: dry mouth, constipation, headache, stomach upset, or dizziness. This medicine may very rarely cause muscle damage that can lead to a very serious condition called rhabdomyolysis.” No numeric information was provided.
Non-numeric	Risk-label only	The table included Risk labels for likelihoods of all AEs (e.g., very common, rare). No numeric information was provided.
Numeric	Percent only	The table included Percentages in place of frequencies (e.g., 14%, 0.05%). No risk labels were provided.
Numeric	Frequency only	The table included frequencies (e.g., 14,000, 50 – out of 100,000 people). No risk labels were provided.
Numeric	Percent+Risk label	The table included risk labels and included Percentages instead of frequencies.
Numeric	Frequency+Risk label	This is Figure 1. Risk labels and frequencies were provided.