Table 2.

Serotonin levels in dogs without or with owner (ng/mL).

Without Owner			With Owner			Difference
n	X ± SD	CV %	n	X ± SD	CV %	(ng/mL)
10	229.04 ± 40.28	17.59	15	292.89 ± 50.29	17.17	63.85 **

** significant (p ≤ 0.003). CV—coefficient of variability.