Table 1.

Repeated measures analysis of covariance (ANCOVA) for ABR amplitude in response to tones and clicks. Shown are means (and ranges) for F statistics, P values, and effect sizes (partial η²) from analysis of the 20 imputed datasets. Bold values indicate variables in which the mean P-value ≤ 0.05

Stimulus	Effect	df	F	P	Partial η2
Tones	frequency	16, 512	26.6 (22.7 - 29.8)	<0.001 (all <0.001)	0.45 (0.42 - 0.48)
	level	4, 128	169.8 (137.6 - 204.4)	<0.001 (all <0.001)	0.84 (0.81 - 0.86)
	sex	1, 32	1.1 (0.8 - 1.4)	0.306 (0.243 - 0.370)	0.03 (0.03 - 0.04)
	size	1, 32	0.1 (<0.1 - 0.2)	0.752 (0.653 - 0.825)	<0.01 (<0.01 - 0.01)
	frequency × level	64, 2048	4.3 (3.7 – 5.0)	<0.001 (all <0.001)	0.12 (0.10 - 0.14)
	frequency × sex	16, 512	3.8 (2.9 - 4.6)	0.015 (0.006 - 0.042)	0.11 (0.08 - 0.13)
	frequency × size	16, 512	0.9 (0.6 - 1.4)	0.440 (0.245 - 0.603)	0.03 (0.02 - 0.04)
	level × sex	4, 128	0.2 (<0.1 - 0.6)	0.745 (0.496 - 0.962)	0.01 (<0.01 - 0.02)
	level × size	4, 128	0.6 (0.3 - 1.2)	0.531 (0.299 - 0.692)	0.02 (0.01 - 0.04)
	frequency × level × sex	64, 2048	1.4 (1.1 - 1.8)	0.156 (0.040 - 0.362)	0.04 (0.03 - 0.05)
	frequency × level × size	64, 2048	1.0 (0.7 - 1.3)	0.473 (0.194 - 0.767)	0.03 (0.02 - 0.04)
Clicks	level	4, 128	86.3 (31.6 - 155.9)	<0.001 (all <0.001)	0.70 (0.50 - 0.83)
	sex	1, 32	1.3 (0.2 - 2.6)	0.291 (0.117 - 0.651)	0.04 (0.01 - 0.08)
	size	1, 32	0.2 (<0.1 - 1.0)	0.723 (0.321 - 0.972)	0.01 (<0.01 - 0.03)
	level × sex	4, 128	1.9 (0.3 - 5.5)	0.253 (0.011 - 0.658)	0.05 (0.01 - 0.15)
	level × size	4, 128	1.1 (0.1 - 6.6)	0.534 (0.005 - 0.898)	0.03 (<0.01 - 0.17)