Table 1.

Beta prior probability distributions used in the Bayesian latent class analysis to estimate sensitivity and specificity of test to identify gastric ulcers in foals

Population and tests	Measure	Prior probability distribution (β)	Mean	Median	90% probability interval
Pre-weaning	Prevalence	2, 8	0.20	0.18	0.041, 0.388
Post-weaning	Prevalence	6, 4	0.60	0.61	0.345, 0.831
Endoscopy	Sensitivity	8, 2	0.80	0.82	0.571, 0.959
	Specificity	99, 1	0.99	0.99	0.970, 0.999
Sucrose 45	Sensitivity	1, 1	0.50	0.50	0.025, 0.975
	Specificity	1, 1	0.50	0.50	0.025, 0.975
Sucrose 90	Sensitivity	1, 1	0.50	0.50	0.025, 0.975
	Specificity	1, 1	0.50	0.50	0.025, 0.975