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.
App-derived usage data.
| Usage data variables | Minimum | Maximum | Mean (SD) |
| Period for which app was used (days) | 18 | 73 | 45.3 (19.2) |
| Percentage of days the app was opened | 13.2 | 57.6 | 35 (16.3) |
| Number of symptoms ranked | 9 | 16 | 11.7 (3.1) |
| Total number of changes made (per month) | 14.2 | 48.3 | 31.6 (13.3) |
