Table 4.

Spearman rank correlation of milking parlor concentrations of inhalable dust, endotoxin, 3-OHFA, ammonia, and muramic acid to CO2, temperature and humidity.

	Dust	Endotoxin	3-OHFA	Muramic Acid	Ammonia
Parlor temperature	0.060	0.371	0.395	−0.143	0.322
	p = 0.0761	p = 0.052	p = 0.051	p = 0.495	p = 0.102
	n = 28	n = 28	n = 25	n = 25	n = 27
Parlor humidity	−0.409	−0.615	−0.571	−0.135	−0.359
	p = 0.031	p = 0.001	p = 0.003	p = 0.519	p = 0.066
	n = 28	p = 28	n = 25	n = 25	n = 27
Parlor carbon dioxide	−0.214	−0.172	−0.308	−0.128	−0.169
	p = 0.274	p = 0.382	p = 0.134	p = 0.541	p = 0.401
	n = 28	n = 28	n = 25	n = 25	n = 27