TABLE 2.

Effects of wooden breast (WB) status, sex, the interaction of WB and sex, and body weight on blood sodium (Na⁺), potassium (K⁺), ionized calcium (iCa), glucose (Glu), hematocrit (Hct), hemoglobin (Hb), pH, partial pressure of carbon dioxide (pCO₂), total carbon dioxide (TCO₂), partial pressure of oxygen (pO₂), oxygen saturation (sO₂), bicarbonate (HCO₃^–), and base excess (BE).

		WB			Sex			WB x Sex					Body Weight
								Affected	Affected	Unaffected	Unaffected
		Affected	Unaffected	P-value	Male	Female	P-value	Male	Female	Male	Female	P-value	P-value
Broilers (n)		55	48		65	38		39	16	26	22
Na+ (mmol/L)	Mean	150.17	149.24	0.123	149.91	149.50	0.611	150.05	150.30	149.78	148.71	0.240	0.320
	SE	0.42	0.47		0.42	0.60		0.58	0.75	0.56	0.74
K+ (mmol/L)	Mean	5.04	4.86	0.045	4.98	4.91	0.569	5.11	4.97	4.85	4.86	0.372	0.127
	SE	0.05	0.06		0.05	0.09		0.08	0.11	0.08	0.11
iCa (mmol/L)	Mean	1.41	1.39	0.416	1.40	1.40	0.983	1.41	1.41	1.40	1.39	0.932	0.266
	SE	0.02	0.02		0.02	0.02		0.02	0.02	0.02	0.02
Glu (mmol/L)	Mean	220.06	222.58	0.366	224.29	218.36	0.119	226.71a	213.42b	221.87a,b	223.30a,b	0.006	0.310
	SE	1.85	2.08		1.87	2.75		2.61	3.43	2.52	3.39
Hct (%PCV)	Mean	23.79	22.84	0.151	23.31	23.32	0.994	23.82	23.76	22.80	22.87	0.919	0.216
	SE	0.50	0.55		0.50	0.69		0.67	0.85	0.64	0.83
Hb (g/dL)	Mean	8.08	7.76	0.161	7.93	7.92	0.989	8.10	8.07	7.75	7.78	0.903	0.211
	SE	0.17	0.19		0.17	0.24		0.23	0.29	0.22	0.29
pH	Mean	7.360	7.389	0.007	7.382	7.367	0.268	7.364	7.356	7.401	7.377	0.396	0.600
	SE	0.008	0.009		0.008	0.011		0.011	0.014	0.010	0.013
pCO2 (mmHg)	Mean	47.26	42.16	0.002	44.69	44.73	0.984	48.82a	45.70a,b	40.55b	43.77a,b	0.041	0.825
	SE	0.88	1.02		0.86	1.55		1.42	1.95	1.26	1.96
TCO2 (mmol/L)	Mean	27.81	26.87	0.125	28.01	26.67	0.111	29.06a	26.57a,b	26.96b	26.78a,b	0.045	0.333
	SE	0.38	0.43		0.38	0.58		0.55	0.74	0.53	0.73
pO2 (mmHg)	Mean	39.85	44.75	<0.001	42.03	42.57	0.751	39.52	40.18	44.54	44.97	0.923	0.352
	SE	1.16	1.22		1.15	1.48		1.42	1.79	1.38	1.71
sO2 (%)	Mean	70.57	79.07	<0.001	74.86	74.78	0.974	70.20	70.94	79.52	78.62	0.647	0.452
	SE	1.37	1.49		1.35	1.95		1.83	2.46	1.76	2.34
HCO3– (mmol/L)	Mean	26.42	25.55	0.133	26.66	25.31	0.087	27.62	25.22	25.70	25.40	0.052	0.371
	SE	0.36	0.41		0.36	0.55		0.53	0.70	0.50	0.69
BE (mmol/L)	Mean	1.00	0.46	0.375	1.60	–0.13	0.036	2.32	–0.31	0.88	0.05	0.113	0.443
	SE	0.42	0.47		1.60	0.61		0.58	0.75	0.56	0.74

Analysis was performed using a mixed linear model approach with poultry house included as a random effect. Data are presented as the least square mean and standard error. Means not sharing a common superscript letter within the interaction effect are significantly different (P < 0.05, Tukey’s HSD test).