Table 2. Logistic Regression and Predicting Missingness.

All four variables were significantly correlated with the missing indicator for 7,665 voxels (65.3%). C-Sep: Percent of voxels with missing data that were perfectly predicted by the variable in combination with other variables. I-Sep: Percent of voxels with missing data that were perfectly predicted by that variable.

	Std. Estimate	95% LCI.	95% UCI.	Z-test	p-value	C-Sep.	I-Sep.
Intracranial Volume	0.80	0.76	0.84	42.27	< 0.001	13.7%	0.0%
MRI Operator	0.69	0.53	0.84	8.78	< 0.001	16.9%	13.6%
Translation	1.08	1.00	1.15	28.29	< 0.001	18.8%	1.1%
Rotation	-1.09	-1.17	-1.01	-26.13	< 0.001	18.6%	1.0%