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

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

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
NH3 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
  1. *Kruskal-Wallis
  2. P = proximal, D = distal and I = intermediate home type.