Airborne cow allergen, ammonia and particulate matter at homes vary with distance to industrial scale dairy operations: an exposure assessment

Table 4 Indoor Air Samples - Proximal, Intermediate and Distal Homes

Analyte	Home Type	n(< LOD)	mean	sd	median	IQR	max		p value*
Bos d 2 μg/m³	Proximal Intermediate Distal	16 (1) 5 (1) 12 (6)	0.20 0.04 0.010	0.27 0.01 0.006	0.12 0.01 0.011	0.24 0.29 0.001	0.97 0.12 0.029	P vs D P vs I D vs I	< 0.01 0.05 0.15
NH_{3 ppb}	Proximal Intermediate Distal	20 (0) 7 (0) 13 (0)	15.7 10.0 5.9	15.1 9.9 3.3	12 4.9 5.7	12.6 20.5 4.4	56.0 25.5 12	P vs D P vs I D vs I	0.01 0.28 0.66
TD μg/m³	Proximal Intermediate Distal	18 (0) 7 (0) 12 (0)	47 34 33	86 31 19	29 22 23	25 26 32	385 100 61	P vs D P vs I D vs I	0.70 0.90 0.67

ISSN: 1476-069X