Table 2 Correlation coefficients and statistics for relationships of striatal normalized T2*-weighted signal with biobehavioral variables in the study sample.

Neurocognitive index	Striatal normalized T2*-weighted signal
Neurocognitive index	Caudate	Putamen	Nucleus accumbens
Go/NoGo task Emotion discrimination	−0.33 (p = 0.001; R²= 0.11)	−0.21 (p = 0.036; R²= 0.04)	−0.23 (p = 0.020; R²= 0.05)
General cognitive control	−0.25 (p = 0.012; R²= 0.06)	−0.20 (p = 0.046; R²= 0.04)	−0.24 (p = .017; R²= 0.06)
Emotion regulation	−0.30 (p = 0.002; R²= 0.09)	−0.27 (p = 0.007; R²= 0.07)	−0.35 (p < .001; R²= 0.12)
HPF Right hippocampus	−0.26 (p = 0.007; R²= 0.07)	0.01 (p = 0.959; R²< 0.001)	0.04 (p = .656; R²= 0.001)
Left hippocampus	−0.19 (p = 0.047; R²= 0.04)	0.03 (p = 0.734; R²< 0.001)	0.06 (p = 0.557; R²= 0.004)

Pearson’s r correlation coefficients and associated uncorrected p-values. Bold text indicates correlation is significant at the 0.05 level (2-tailed) after correcting for multiple comparisons; italicized text indicates significant at the 0.05 level in uncorrected analyses only. Go/NoGo task indices coded such that higher values indicate better task performance. HPF = Hippocampal Parachymal Fraction, higher scores indicate greater hippocampal volumetric integrity (less atrophy). For normalized T2*-weighted signal, higher values indicate lower tissue iron concentration.

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