. Author manuscript; available in PMC: 2020 Aug 1.

Published in final edited form as: J Vet Cardiol. 2019 May 11;24:7–19. doi: 10.1016/j.jvc.2019.05.001

Table 1.

Description and comparison of baseline characteristics of the study population.

	Treatment
Characteristic	Sildenafil	Tadalafil	p-value
Age (years)	10.5 years (2.9)	9.1 years (4.9)	0.44^a
Weight (kilogram)	6.3 kilograms (3.2)	8.1 kilograms (4.6)	0.31^a
Sex (FS, FI, MC, MI)	6, 0, 2, 2	7, 0, 3, 1	1.00^b
Breed	Mixed breed (n=2), WHWT (n=2), Pomeranian (n=2), YST, Rat Terrier, Chihuahua, MP	Chihuahua (n=2), Shih Tzu (n=2), Border Terrier, mixed breed, YST, Standard Poodle, MAS, Cairn Terrier, WHWT

FI: female intact; FS: female spayed; MAS: Miniature Australian Shepherd; MC: male castrated; MI: male intact; MP: Miniature Poodle; n: number; WHWT: West Highland White Terrier; YST: Yorkshire terrier;

Parametric continuous data presented as mean (SD) and compared with a two-tailed Student’s t-test,

categorical data presented as a proportion and compared with a Fischer Exact test.