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.
Receiver operating characteristic curves at the within–48-h time point segmented by, A, sex, B, sport contact level, C, academic year, D, learning disorder, E, attention-deficit/hyperactivity disorder, F, migraine history, G, concussion history, and H, administration mode (P < .05). The horizontal dotted line at y = 80 indicates 100% specificity at a sensitivity of 80%. a Indicates difference in area under the receiver operating characteristic curve (P < .001).
