Measurements of Epidural Space Depth Using Preexisting CT Scans Correlate with Loss of Resistance Depth during Thoracic Epidural Catheter Placement

Table 3

Regression analysis.

Multivariable regression analysis
	Coefficient	95% Cl	value
CT epidural skin distance (mm)	0.053	[0.050, 0.075]	<0.0001
BMI > 35	−0.59	[−1.01, −0.16]	0.007
Constant	3.30	[2.71, 3.88]	<0.0001