Table 4.

Relationship of longer-term heading and DTI measures

Athlete Quartile (Longer Term Heading)	N	High AD	Low AD	High MD	Low MD	High RD	Low RD	High FA	Low FA (covariate: age)
Test of Model Effect raw p (adjusted p value)	-	0.204 (1.632)	0.214 (1.712)	0.216 (1.728)	0.012 (0.096)	0.477 3.816)	0.000000208 (0.0000016)	0.004 (0.032)	0.394 (3.152)
Q4 B(p)	89	−478.00 (0.40)	−764.63 (0.04)	−641.77 (0.49)	−1067.76 (0.00)	−1383.19 (0.28)	−1037.48 (0.00)	−886.73 (0.00)	−929.07 (0.61)
Q3 B(p)	91	−1.82 (0.99)	−714.28 (0.05)	−246.50 (0.79)	−717.18 (0.03)	1122.30 (0.38)	−560.23 (0.03)	−479.34 (0.09)	−1801.32 (0.23)
Q2 B(p)	88	−35.5 (0.43)	−594.7 (0.12)	−663.24 (0.47)	−342.94 (0.34)	−1393.72 (0.27)	−423.22 (0.10)	−456.34 (0.11)	−775.06 (0.6)
Q1 B(p)	89	−504.00 (0.35)	−529.63 (0.19)	−899.01 (0.32)	−93.15 (0.87)	−1435.64 (0.26)	−209.66 (0.58)	−356.38 (0.28)	−1614.34 (0.28)