Table 1. Subgroup analyses for the correlation between SUV and ADC.
| factors | subgroup | n | r (95% CI) | p value |
| study design | prospective | 22 | -0.34 (-0.39, -0.28) | >0.05 |
| retrospective | 21 | -0.33 (-0.37, -0.29) | ||
| scanning modality | PET/CT+MRI | 32 | -0.32 (-0.37, -0.28) | >0.05 |
| PET/MRI | 11 | -0.33 (-0.37, -0.29) | ||
| cancer type | lung cancer | 11 | -0.42 (-0.48, -0.35) | |
| head-neck cancer | 6 | -0.29 (-0.41, -0.17) | ||
| cervical cancer | 4 | -0.08 (-0.26, -0.10) | ||
| breast cancer | 4 | -0.23 (-0.33, -0.13) |