. 2018 Apr 26;6(2):e26. doi: 10.2196/medinform.9063

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	NWSI^a	ADNIMERGE^b
Mean	1.22	1.217
Variance (SUVR^c)	.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.