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

Table 2

Analysis result.

Anesthesiologists’ measurements versus radiologist’s measurement
	Anesthesiologist 1	Anesthesiologist 2	Anesthesiologist 3
Measurements within 1 cm	98%	98%	100%
Measurements within 0.5 cm	98%	96%	86%
Measurements were the same	22%	34%	18%
Root mean squared error	2.5	2.3	3.7
Intraclass correlation coefficient	0.98	0.99	0.97