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Table 2: 
Agreement and correlation between NCCT and MR imaging for cortical and subcortical atrophy assessments, respectivelya
NCCTMRIGwet AC1a
GCA (median) (min-max)b0 (0–2)0 (0–3)0.815
GCA ≥1 (No.) (%)133 (23.8)245 (43.9)0.500
Koedam (median) (min-max)b0 (0–2)0 (0–3)0.784
Koedam ≥1 (No.) (%)172 (30.8)261 (46.8)0.512
MTA (median) (min-max)b0 (0–4)0 (0–4)0.833
MTA ≥1 (No.) (%)123 (22.0)213 (38.2)0.554
CC/IT ratio (median) (IQR)b0.12 (0.09–0.14)0.12 (0.09–0.15)0.746 (Pearson correlation)
CC/IT ratio ≥0.16 (No.) (%)c87 (15.6)93 (16.7)0.523
  •  Note:—min indicates minimum; max, maximum.
  • ↵a All P values are <.001.
  • ↵b Full categoric scale is provided. Linear-weighted Gwet AC1.
  • ↵c Cutoff is chosen on the basis of prior literature.35