Table 2.
Paired t test comparing Neuroimaging Web Services Interface (NWSI) and Alzheimer's Disease Neuroimaging Initiative (ADNI) Merge 18F-Florbetapir Positron Emission Tomography (PET) Global standardized uptake value ratio (SUVR) values.
| Results | NWSIa | ADNIMERGEb |
| Mean | 1.22 | 1.217 |
| Variance (SUVRc) | .047 | .044 |
| Observations | 18 | 18 |
| t Stat(degrees of freedom 17) | .26 | — |
| P (T≤t) two-tail | .79 | — |
| t critical two-tail (SUVR) | 2.11 | — |
aNWSI: Neuroimaging Web Services Interface.
bADNI: Alzheimer's Disease Neuroimaging Initiative.
cSUVR: standardized uptake value ratio.