The concentration of three anti-seizure medications in hair: the effects of hair color, controlling for dose and age

Table 8 General Linear Model, Analysis of Covariance, Hair Assay Outcome by Color, Dose, Dose Duration, and Age, VPA.

Source	Type III Sum of Squares	df	Mean Square	F	Sig.	Eta²
Corrected Model	299.12	6	49.85	11.38	.000	.674
Intercept	10.52	1	10.52	2.40	.131	.068
VPADOSE	61.03	1	61.03	13.93	.001	.297
DOSEDUR	11.55	1	11.55	2.64	.114	.074
AGE	23.35	1	23.35	5.33	.027	.139
COLOR	51.16	3	17.05	3.892	.017	.264
Error	144.59	33	4.38
Total	3143.34	40
Corrected Total	443.71	39