Table 3.

Mean body weight (g) of mice and proportion of mice that lost weight (% of group; mean ± 1 SD)

Diagnosis	Starting weight	Weight at necropsy	% of mice in group that lost weight
Rhinitis	48	47.3	6.90 ± 4.86
Necrosis of olfactory epithelium	47.8	48.4	2.80 ± 2.32
Degeneration of respiratory or transitional epithelium (or both)	45.6	47.1	2.70 ± 2.68
Ammonia exposure but no lesions	42.6	47.1	5.60 ± 2.91
No exposure and no lesions	45.3	47.0	4.4 ± 2.91

Fisher's exact test showed that there was no significant association between diagnosis and loss of body weight.