Table 5. Multivariable assessment of MS scores using multinomial logistic regression.

Variable	Beta	Odds Ratio	P value
Intercept 1 (Score 0 vs. Score 1)	0.506		0.029
Intercept 2 (Score 0 vs. Score 2)	1.557		< 0.001
Intercept 3 (Score 0 vs. Score 3)	4.089		< 0.001
Time on Hard Substrate	0.049	1.050	0.002
Space Experience In/Out Choice (per 500 ft2)	0.036	1.037	0.039
Age*Space Experience In/Out Choice (per 500 ft2)	-0.001	0.999	0.045