Incidence of GDV for the 7 large (23 to 45 kg [50 to 99 lb]) and 4 giant (> 45 kg [> 99 lb]) breeds was 23 and 26 cases/1,000 dog-years at risk, respectively. Of the 105 dogs that developed GDV, 30 (28.6%) died. Incidence of GDV increased with increasing age. Cumulative incidence of GDV was 5.7% for all breeds. The only breed-specific characteristic significantly associated with a decreased incidence of GDV was an owner-perceived personality trait of happiness.
Cumulative incidence of GDV during the study was 6% for large breed and giant breed dogs. Factors significantly associated with an increased risk of GDV were increasing age, having a first-degree relative with a history of GDV, having a faster speed of eating, and having a raised feeding bowl. Approximately 20 and 52% of cases of GDV among the large breed and giant breed dogs, respectively, were attributed to having a raised feed bowl.
Body measurements, history of gastric dilatation-volvulus (GDV), and other data were obtained for 155 Irish setters at the 1994 National Specialty Show. The dogs ranged in age from 6.5 months to 12.4 years (mean+/-standard deviation [SD], 3.6+/-2.6 years); 11 (7%) of the dogs had histories of GDV. Gastric dilatation-volvulus risk increased 33% for each year of age (p of 0.01). Dogs with the deepest thorax relative to width (ratio range, 1.61 to 1.85) had a significantly greater GDV risk than those with the shallowest thorax (ratio range, 1.20 to 1.50); the odds ratio was 8.45; the 95% confidence limits were 1.44 to 49.57; and the p value equaled 0.02. Having a relative (particularly a parent) with GDV also increased GDV risk. Five-generation pedigrees yielded a significantly higher mean coefficient of relationship for the 11 dogs with GDV than for the 11 dogs without GDV.
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