Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Statistics of page elements during symptom searches (N=28,552).
| Page elements | Visible to the user, n (%) | Clicks on visible elements, n (%) | Time spent (when all elements are shown), seconds (%) |
| Ads | 13,171 (46) | 1633 (12) | 5.7 (20) |
| Info box | 18,215 (64) | N/Aa | 6.1 (25) |
| Itemized web results | 23,354 (82) | 1798 (8) | 2.7 (10) |
| Standard web results | 24,034 (84) | 4612 (19) | 7.1 (23) |
aN/A: not applicable. Info boxes are not usually clicked, and therefore, this number is not given.
