Table 2. Simple linear regression model for TAT level in dogs admitted to the Saitama Animal Medical Center from September 2014 to March 2016 (n = 359).

Variable	Coefficient	95% CI	p-value
Group 1 (n = 102)	Reference
Group 2 (n = 65)	0.11	-2.02–2.25	0.916
Group 3 (n = 78)	0.28	-1.78–2.34	0.772
Group 4 (n = 65)	2.57	0.40–4.75	0.012
Group 5 (n = 29)	5.18	2.30–8.07	<0.0001
Group 6 (n = 20)	15.29	11.94–18.64	<0.0001