Figure 2.
Item analysis for the HIT-6 items. The line denotes total mean of all items. Numbers indicate corresponding items in the HIT-6.
Abbreviation: HIT-6, headache impact test-6.
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.