Table 3.

Location and scale hyperparameter values of the normal prior distributions (6) for model ModII (L = 6, M = 3, V = 2).

Sensitivity	α 1k ~ N(5.8,2.0)	k = 1,2, 3,5, 6
	α 14 ~ N(−0.5,0.25)
	γ 1kc ~ N(0,100)	c = 1,2, 3, k = 1,2, 3,4, 5,6
Specificity	α 0k ~ N(3.5,2.0)	k = 1
	α 0k ~ N(6.5,3)	k = 2,3, 6
	α 0k ~ N(100,1E − 100)	k = 4
	α 0k ~ N(2,1)	k = 5
	γ 0kc ~ N(0,100)	c = 1,2, 3, k = 1,2, 3,5, 6
	γ 0kc ~ N(0,0)	c = 1,2, 3, k = 4
Prevalence	α v ~ N(0.5,0.25)	v = 1
	α v ~ N(−2,1)	v = 2
	γ vc ~ N(0,100)	c = 1,2, 3, v = 1,2

   c = 1: AGE-age (≤30, >30 years); c = 2: GEN-gender (male, female); c = 3: RFE-presence of at least two of three risk factors epidemiological (origin from an endemic region, contact with the vector transmitting the disease and family history of Chagas' disease); Stratum I (v = 1) donors with negative or positive serology and Stratum II (v = 2) with inconclusive serology in the screening test; γ _1kc: effect of the cth covariate on the sensitivity of kth test; γ _0kc: effect of the cth covariate on the specificity of kth test; γ _vc: effect of the cth covariate on disease prevalence in vth stratum.