Table 2.

Variance Components Estimates (VCE), Percentages of Measurement Error Variability (MEV), and 95% Confidence Intervals (CI) Using Cadaveric and Plastic Temporal Bones

	Model 1a With Session		Model 1b Random		Model 1c With PGY Level		Model 1d With PGY Level and Bone Difficulty
Random Effects	VCE	%	VCE	%	VCE	%	VCE	%
Resident	107.37		231.37		91.34		99.91
CI	48.96, 394.22		105.50, 849.49		41.65, 335.38		45.56, 366.82
Rater		0	5.87	4.28	5.87	4.28	3.79	2.91
CI		—	2.68, 21.54		2.67, 21.54		1.73, 13.92
Bone:resident	88.79	60.06	84.08	61.35	84.07	61.35	81.25	62.35
CI	40.49, 325.99		42.70, 235.48		42.70, 235.48		40.76, 234.31
Resident × Rater	10.01	6.78	13.81	10.07	13.81	10.07	15.09	11.58
CI	5.12, 38.44		6.63, 44.19		6.64, 44.19		7.57, 43.54
Rater × Bone:resident	40.55	27.43	33.29	24.29	33.29	24.29	30.19	23.17
CI	32.94, 51.14		24.27, 48.53		24.27, 48.53		21.73, 44.88
Session components		5.74
Session × Resident	3.09
CI	1.41, 11.36
Session × Rater	4.68
CI	2.14, 17.20
Session × Bone:resident	0.72
CI	0.33, 2.63
Session × Resident × Rater	0.00
CI	—
Total of MEV components	147.84		137.05		137.04		130.02

Note: PGY = postgraduate year. The factors constitute the measurement error components; the last row is the addition of all the estimates except the “resident” component.