HSP90B2P and hereditary spastic paraplegia: In a ROC curve analysis, both the full cognitive GREFEX battery and the HSP provided very similar (p = 0.27) AUCs (full GREFEX battery: 0.745, 95%CI: 0.704–0.785); HSP: AUC = 0.728, 95%CI: 0.687–0.769).