Table 3. Number of statistically significant ROIs before and after harmonization using a two sample Kolmogorov-Smirnov (KS) test between pairs of scanners for different feature categories at α = 0.05.
| scanner | gray matter volumes | Cortical thickness | Fractal dimension | Sulcal depth | Gyrification index | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| # BH | # AH | # BH | # AH | # BH | # AH | # BH | # AH | # BH | # AH | |
| AOMIC − BNUBeijing | 35 | 0 | 53 | 0 | 44 | 0 | 59 | 0 | 36 | 1 |
| AOMIC − Guys | 44 | 0 | 51 | 0 | 2 | 0 | 9 | 0 | 6 | 0 |
| AOMIC − SWU | 41 | 0 | 32 | 0 | 33 | 0 | 45 | 0 | 30 | 1 |
| AOMIC − NIMHANS | 44 | 0 | 29 | 0 | 23 | 1 | 31 | 0 | 13 | 0 |
| BNUBeijing − Guys | 44 | 0 | 38 | 0 | 19 | 0 | 40 | 0 | 15 | 0 |
| BNUBeijing − SWU | 28 | 0 | 35 | 0 | 4 | 0 | 18 | 0 | 13 | 0 |
| BNUBeijing − NIMHANS | 40 | 1 | 51 | 0 | 21 | 0 | 43 | 0 | 31 | 0 |
| Guys − SWU | 56 | 0 | 55 | 0 | 35 | 0 | 40 | 0 | 36 | 0 |
| Guys − NIMHANS | 35 | 0 | 47 | 1 | 8 | 0 | 8 | 0 | 7 | 0 |
| SWU − NIMHANS | 27 | 1 | 41 | 0 | 24 | 0 | 27 | 0 | 27 | 0 |
BH: before harmonization; AH: after harmonization.