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. Author manuscript; available in PMC: 2009 Sep 4.
Published in final edited form as: Inhal Toxicol. 2008 Sep;20(12):1085–1092. doi: 10.1080/08958370802120396

Table 3.

Average ratings of odor intensity, irritation and annoyance to three individually-determined concentrations of ammonia vapor.

Asthmatic Healthy
Mean SEM Mean SEM
Intensity BT 8.6 2.23 8.27 1.62
Intensity T 9.5 1.66 9.25 1.44
Intensity AT 12.5 2.17 11.9 1.42
Irritation BT 6.9 1.51 8.7 1.32
Irritation T 10.6 1.39 9.7 1.72
Irritation AT 15.2 1.86 12.35 2.55
Annoyance BT 8.8 2.3 9 1.84
Annoyance T 8.9 1.6 9.57 2.12
Annoyance AT 13.5 2.09 11.03 2.3

BT = Below threshold; T = At threshold; AT = Above threshold