Subcutaneous Administration of Tramadol after Elective Surgery Is as Effective as Intravenous Administration in Relieving Acute Pain and Inflammation in Dogs

Table 2

The relationship between the subjective parameters and mechanical pain threshold was assessed using multiple linear regression.

	IV route				SC route
Model			Confidence interval				Confidence interval
Constants independent variables	Beta	P value (𝑃<0.05)	Lower bound	Upper bound	Beta	P value (𝑃<0.05)	Lower bound	Upper bound
Respiratory rate (cycles/min)	−0.472	0.001	−0.19	−0.053	−0.319	0.008	−0.101	−0.016
Rectal temperature (°C)	0.004	0.972	−3.029	3.139	0.13	0.244	−0.779	2.996
Heart rate (beats/min)	−0.16	0.233	−0.08	0.20	−0.652	0.00	−0.121	−0.059

Dependent variable: mechanical pain threshold (𝑁).