Risk factors for development of dysautonomia in dogs.
OBJECTIVE
To identify risk factors associated with dysautonomia in dogs.


METHODS
Case-control study.


METHODS
42 dogs with dysautonomia examined between October 1988 and January 2000 and 132 control dogs examined during the same period for an unrelated problem.


METHODS
Information was gathered from medical records and surveys mailed to owners of case and control dogs.


RESULTS
42 case and 132 control dogs were included; completed surveys were returned by owners of 30 case and 103 control dogs. Dogs with dysautonomia were significantly younger (median, 18 months) than control dogs (median, 60 months) and more likely to come from rural areas and to spend > or =50% of their time outdoors. Compared with rural control dogs that spent at least some time outdoors, affected dogs were more likely to have access to pasture land, farm ponds, and cattle, and to have consumed wildlife, at least occasionally. The largest numbers of dogs with dysautonomia were identified during February and April, with relatively few dogs identified during the summer and early fall.


CONCLUSIONS
Although the cause of dysautonomia is unknown, results suggest that dogs with dysautonomia were significantly more likely to live in rural areas and spend > or =50% of their time outdoors than were control dogs examined for unrelated diseases.
Berghaus
R D
RD
Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia 65211, USA.
O'Brien
D P
DP
Johnson
G C
GC
Thorne
J G
JG
D000367:Age Factors; D000818:Animals; D001342:Autonomic Nervous System Diseases / Q000209:etiology / Q000662:veterinary*; D016022:Case-Control Studies; D003625:Data Collection; D004283:Dog Diseases / Q000209:etiology*; D004285:Dogs; D005260:Female; D008297:Male; D012307:Risk Factors; D012424:Rural Population; D012621:Seasons