Comparison of hippocampal subfield volume of HCs, SCH, and OH groups. (A) Right GC-ML-DG head subfield. (B) Intergroup differences in right GC-ML-DG head volume among the 3 groups. (C) Left GC-ML-DG head subfield. (D) Intergroup differences in left GC-ML-DG head volume among the 3 groups. (E) Right CA4 head subfield. (F) Intergroup differences in right CA4 head volume among the 3 groups. (G) Left CA4 head subfield. (H) Intergroup differences in left CA4 head volume among the 3 groups. (I) Right ML head subfield. (J) Intergroup differences in right ML head volume among the 3 groups. (K) Right CA3 head subfield. (L) Intergroup differences in right CA3 head volume among the 3 groups. (M) Right CA1 body subfield. (N) Intergroup differences in right CA1 body volume among the 3 groups. (O) Graphical representation of hippocampal subfields segmentation. GC-ML-DG, granule cell molecular layer of the dentate gyrus; ML, molecular layer; HCs, healthy controls; SCH, subclinical hypothyroidism. OH, overt hypothyroidism.