Table 5.

Descriptors of different models studying the effect of standardized ileal digestible (SID) Lys:CP ratio on G:F and serum urea level

	10 g SID Lys			11 g SID Lys			Overall
	QP1	BLL	BLQ	QP	BLL	BLQ	QP	BLL	BLQ
G:F
r 2	0.26	0.25	0.24	0.43	0.44	0.43
AIC2	−127	−126	−126	−121	−122	−122
BIC3	−120	−120	−119	−116	−116	−116
Breakpoint CP	171	165	174	190	176	191
Breakpoint SID Lys:CP	0.059	0.061	0.058	0.057	0.062	0.058
Serum urea level
r 2	0.76	0.77	0.76	0.63	0.65	0.66	0.72	0.74	0.74
AIC	360	358	360	343	339	338	701	691	693
BIC	369	367	369	352	348	347	713	704	705
Breakpoint CP	142	155	142	150	173	162
Breakpoint SID Lys:CP	0.069	0.064	0.069	0.073	0.063	0.068	0.072	0.064	0.068

¹QP = quadratic models; BLL = broken line models with linear ascending portion; BLQ = broken line models with quadratic ascending portion.

²AIC = Akaike information criterion.

³BIC = Bayesian information criterion.