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Table 1: Patient demographics
GBM (n = 17) LGG (n = 6) Metastasis (n = 8) P Value
Age, yr (mean) (range) 61.4 ± 9.2 (45–76) 46.5 ± 12.1 (38–67) 63.5 ± 8.6 (48–76) .03^{^a}
Sex (No.) 
    Female 8 (47.1%) 2 (33.3%) 5 (62.5%) .57^{^b}
    Male 9 (52.9%) 4 (66.7%) 3 (37.5%) 
Steroids (No.)^{^c} 
    Yes 5 (29.4%) 1 (16.7%) 3 (37.5%) .77^{^b}
    No 12 (70.6%) 5 (83.3%) 5 (62.5%) 
IDH1 (No.) 
    Positive 0 (0.0%) 4 (66.7%) NA .003^{^d}
    Negative 11 (100.0%) 1 (16.7%)^{^e} NA 
Note:—NA indicates not applicable.
↵a P value from the Kruskal-Wallis test. Results of the Wilcoxon rank sum tests showed that the LGG group differed in age from the GBM and metastasis groups (P = .014 and .023, respectively) and that the GBM and metastasis groups did not differ in age (P = .68).
↵b P value from an exact version of the Pearson χ² test comparing proportions in the 3 groups.
↵c Wilcoxon rank sum test revealed no differences in T1 and T2 values when patients with the presence and absence of steroid treatment were compared by tumor type.
↵d P value from the Fisher exact test comparing GBM and LGG groups.
↵e IDH1 status of 1 patient with LGG was unknown.