Table 4.

Blood plasma analytes least square means (confidence interval) across the performance evaluation test in heifer calves by feed efficiency group repeatedly sampled.

Traits (Abbreviation; Unit)	Efficient	Inefficient	p-Value
Enzymes
Alkaline phosphatase (ALP; U/L)	86.4 (93.9, 121)	98.6 (103, 131)	0.03
Aspartate aminotransferase (AST; U/L)	56.1 (54.3, 57.9)	55.2 (53.3, 57.0)	0.24
Creatine kinase (CK; U/L)	160 (170, 196)	155 (165, 192)	0.22
Gamma glutamyl transferase (GGT; U/L)	16.5 (15.9, 17.1)	16.4 (15.7, 17.0)	0.76
Glutamate dehydrogenase (GLDH; U/L)	20.4 (17.9, 23.0)	21.6 (19.0, 24.2)	0.55
Compounds
Albumin (g/L)	34.0 (33.3, 34.2)	33.8 (33.4, 34.2)	0.87
Albumin globulin ratio	1.01 (0.99, 1.04)	1.02 (1.00, 1.05)	0.18
Beta hydroxy butarate acid (BHBA; µmol/L)	155 (153, 169)	156 (153, 168)	0.99
Carbon dioxide (CO2; mmol/L)	23.3 (22.9, 23.8)	23.5 (23.0, 23.9)	0.73
Cholesterol (mmol/L)	3.3 (3.3, 3.5)	3.36 (3.31, 3.57)	0.72
Creatinine (µmol/L)	115 (112, 119)	113.2 (109, 116)	0.32
Globulin (g/L)	34.1 (33.3, 34.8)	33.7 (32.9, 34.5)	0.50
Glucose (mmol/L)	4.43 (4.30, 4.57)	4.47 (4.33, 4.61)	0.32
Non-esterified fatty acids (NEFA: mmol/L)	0.35 (0.31, 0.38)	0.31 (0.28, 0.35)	0.15
Urea (mmol/L)	2.64 (2.57, 2.71)	2.65 (2.58, 2.73)	0.79
Ions
Anion Gap (mmol/L)	27.7 (27.1, 28.3)	27.2 (26.6, 27.8)	0.26
Calcium (mmol/L)	2.39 (2.38, 2.41)	2.40 (2.38, 2.42)	0.55
Chloride (mmol/L)	94.5 (94.2, 94.8)	94.7 (94.4, 95.0)	0.33
Magnesium (mmol/L)	0.87 (0.86, 0.88)	0.88 (0.86, 0.89)	0.44
Osmolality (mmol/L)	277 (277, 278)	277 (277, 278)	0.87
Potassium (mmol/L)	2.23 (2.18, 2.27)	2.16 (2.11, 2.20)	0.03
Phosphorus (mmol/L)	4.36 (4.31, 4.41)	4.24 (4.19, 4.29)	<0.01
Sodium (mmol/L)	141 (141, 141)	141 (141, 141)	0.98
Hormone
Triiodothyronine (T3; nmol/L)	1.81 (1.75, 1.88)	1.90 (1.83, 1.96)	0.06