Table 6. Equations for linear regression of ruminal fermentation parameters on 3-nitrooxypropanol levels (mg/kg of DMI) from beef database

Parameter	Parameter estimates							Model statistics
	n	intercept	SE intercept	p-value	Slope	SE slope	p-value	RMSE	R2
Total VFA (mM)	16	113.370	8.5296	< 0.0001	−0.0622	0.01131	0.0015	2.886	0.804
Acetate (%)	15	61.209	3.3136	< 0.0001	−0.0298	0.00336	0.0003	0.902	0.918
Propionate (%)	17	22.215	2.9321	0.0003	0.0112	0.00429	0.048	1.514	0.425
Butyrate (%)	17	11.298	1.2231	< 0.0001	0.0087	0.00332	0.0473	0.975	0.452
Iso-butyrate (%)	17	1.072	0.0571	< 0.0001	0.0005	0.00019	0.0396	0.078	0.426
Valerate (%)	17	1.775	0.2273	0.0002	0.0015	0.00042	0.0158	0.126	0.636
Iso-valerate (%)	18	1.843	0.1876	< 0.0001	0.0020	0.00092	0.0733	0.240	0.349
A:P ratio	17	3.187	0.3969	0.0002	−0.0036	0.00037	0.0002	0.107	0.924
DMI (g/kg)	36	9.103	0.5638	< 0.0001	−0.0016	0.00075	0.0574	0.331	0.170

VFA, volatile fatty acids; A:P ratio, acetate to propionate ratio; DMI, dry matter intake; SE, standard error; RMSE, residual mean square error; R², coefficient of determination.