Table 2. Descriptive statistics of categorical variables significantly associated with respiratory score as calculated for 1000 cats from owner-reported responses concerning breathing noise whilst asleep and breathing difficulty following activity.

Categorical Variable	Sub-category	Mean Respiratory Score (95% Confidence interval)	SD	N
Tear staining	No	2.77 (2.70–2.84)	1.00	759
	Yes	3.54 (3.33–3.74)	1.63	241
Activity level	Sedentary	3.25 (3.07–3.43)	0.09	264
	Adequate	2.94 (2.83–3.04)	1.14	452
	Active	2.78 (2.64–2.92)	1.03	214
	Very active	2.50 (2.23–2.77)	1.15	70