Kendall’s Tau scores comparing IGF-1 Z-scores with GAD-7 scores for mTBI and msTBI groups without pre-morbid anxiety were less negative than their counterparts with anxiety, though correlations were still strong and statistically significant (mTBI: τ = −0.49, p < 0.0001; msTBI: τ = −0.67, p < 0.0001). Here, IGF1 is linked to Anxiety.