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.
Relationship Between Exposure to Repetitive Head Impacts and CSF Total Tau in Former National Football League Players. As shown in Table 3, independent regressions showed a statistically significant association between the cumulative head impact index and t-tau after controlling for age, BMI, and race (p = 0.041). Figure 1 shows the unadjusted relationship between the cumulative head impact index and CSF total tau, which was also statistically significant: r = 0.27, p = 0.024.
