Table A.3.

Mushroom spine density
Effect	Num df	Den df	F-value	p-value
Age	1	17.47	11.10	0.004*
Genotype	1	17.47	7.68	0.013*
Age*Genotype	1	17.47	12.10	0.003*
Stubby spine density
Effect	Num df	Den df	F-value	p-value
Age	1	15.89	4.05	0.062
Genotype	1	15.89	1.87	0.191
Age*Genotype	1	15.89	10.72	0.005*
Thin spine density
Effect	Num df	Den df	F-value	p-value
Age	1	14.68	0.93	0.352
Genotype	1	14.68	0.06	0.804
Age*Genotype	1	14.68	0.10	0.762
Thorny spine density
Effect	Num df	Den df	F-value	p-value
Age	1	70.42	0.02	0.893
Genotype	1	70.42	3.79	0.056
Age*Genotype	1	70.42	0.02	0.893

Fixed effects and adjusted P values for individual comparisons of spine types at and post-pubertally in non-proestrous wild-type and α4 −/− mice. Statistics were performed using a multi-level model.

^*Statistically significant.