. 2020 Jul 11;6(7):e04400. doi: 10.1016/j.heliyon.2020.e04400

Table 6.

Effects of strain (Cobb or Ross), sex (Male or Female) and age on broiler blood carotene, aspartate aminotransferase (AST), creatine kinase (CK), bile acids (BA), uric acid (UA), total protein (TP), albumin (ALB), globulin (GLOB).

Strain	Sex	Age	Carotene	AST	CK	BA	UA	TP	ALB	GLOB
Strain	Sex	Age	(mg/kg)	(U/L)		(μmol/L)	(mg/dL)	(g/L)
Cobb			2.30	393.0	4359	11.37	6.3	3.06	2.33	0.73
Ross			2.30	392.3	4017	10.10	5.7	2.96	2.31	0.64
P <			0.982	0.751	0.570	0.243	0.003	<0.001	0.305	<0.001
	Male		2.17	386.7	4064	10.28	5.6	3.04	2.28	0.68
	Female		2.42	398.0	4313	11.19	6.4	2.97	2.35	0.69
	P <		<0.001	0.781	0.605	0.404	<0.001	0.011	0.002	0.928
		14 d	1.49^d	193.7^d	2401^b	12.6^a	6.2^b	2.67^c	2.20^b	0.45^c
		21 d	2.10^c	225.7^d	4908^a	13.4^a	6.2^b	2.95^b	2.36^a	0.59^b
		28 d	2.26^bc	335.6^c	5255^a	11.4^ab	6.3^b	2.97^b	2.31^a	0.64^b
		35 d	3.09^a	494.5^b	.	9.1^ab	6.9^b	3.25^a	2.39^a	0.87^a
		42 d	2.55^b	713.6^a	.	7.2^b	4.4^a	3.21^a	2.34^a	0.87^a
		P <	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
		Linear P <	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
		Quadratic P <	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	0.436
Model Pooled SEM¹			0.140	42.79	727	727	727	2.6	0.05	0.06

Interaction Terms			(Probability > F)

Strain∗Age			0.283	0.702	0.505	0.625	0.219	0.012	0.571	0.103
Sex∗Age			0.058	0.685	0.052	0.068	0.002	0.261	0.016	0.507
Strain∗Sex			0.245	0.675	0.509	0.114	0.429	<0.001	0.050	0.048
Strain∗Age∗Sex			0.381	0.023	0.020	0.179	0.171	0.285	0.775	0.358

^ab Means within a column of 3 or more independent variables lacking a common superscript differ significantly (P < 0.05).

SEM = Standard error of mean, main effect means of strain and sex calculated using n = 200, main effect means of age calculated using n = 80.