Table 5.

Pearson correlation coefficients of fractional anisotropy (FA) with neurological outcome measured with Glasgow Outcome Scale extended (GOSe), white matter hyperintensities measured, time post-injury, and age as well as non-parametric Spearman correlation coefficient of FA with Fazekas. Two-tailed significance was used to test the statistically significant correlation (p < 0.05).

Study group	FA and GOSe	FA and Fazekas	FA and time	FA and age
All mTBI (n = 102)	r = 0.363 p = 0.0003	r = − 0.619 p < 0.0001	r = − 0.013 p = 0.899	r = − 0.787 p < 0.0001
mTBI with PTA ≤ 24 h (n = 78)	r = 0.341 p = 0.004	r = − 0.646 p < 0.0001	r = 0.071 p = 0.535	r = − 0.814 p < 0.0001
mTBI with PTA > 24 h (n = 24)	r = 0.227 p = 0.311	r = − 0.352 p = 0.092	r = − 0.289 p = 0.170	r = − 0.639 p < 0.001