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Table 1 Overview of the informative priors and the models used for updating informative and minimally-informative priors

From: A dynamic Bayesian Markov model for health economic evaluations of interventions in infectious disease

Parameter

Description

Distribution/model BMM

Distribution/model BODE

Mean

2.5/97.5% percentiles

ω M H

Partner acquisition rate (high-risk males)

Poisson-Gamma model

Equivalent to BMM

9.10

[8.77;9.29]

ω M L

Partner acquisition rate (low-risk males)

Poisson-Gamma model

Equivalent to BMM

2.98

[2.82;3.12]

ω F H

Partner acquisition rate (high-risk females)

Poisson-Gamma model

Equivalent to BMM

9.00

[8.71;9.26]

ω F L

Partner acquisition rate (low-risk females)

Poisson-Gamma model

Equivalent to BMM

1.96

[1.86;2.09]

χ

Proliferation parameter

Gamma(1111.1,111111.1)

Gamma(1111.1,111111.1)

0.01

[0.01;0.01]

β

STI transmission probability per partnership

Beta-Binomial model

Equivalent to BMM

0.16

[0.15;0.16]

π 2,3

Transition parameter from state 2 to state 3

Beta(5119.2, 1279.8)

Gamma(25600,32000)

0.80

[0.79;0.81]

π 3,4

Transition parameter from state 3 to state 4

Beta(1842.66, 18631.34)

Gamma(2025,22500)

0.09

[0.09;0.09]

π 4,5

Transition parameter from state 4 to state 5

Beta(1535.96, 36863.04)

Gamma(1600,40000)

0.04

[0.04;0.04]

π 1,5

Transition parameter from state 1 to state 5

Beta(156.171, 312186.6)

Gamma(156.25,312500)

<0.01

[<0.01;<0.01]

η

Probability of STI diagnosis

Beta-Binomial model

Equivalent to BMM

0.90

[0.88;0.92]

σ

Screening probability

Beta-Binomial model

Equivalent to BMM

0.90

[0.87;0.92]

α

Vaccine coverage parameter

Beta-Binomial model

Equivalent to BMM

0.90

[0.87;0.92]

γ

Vaccine efficacy parameter

Beta-Binomial model

Equivalent to BMM

0.90

[0.87;0.92]

c screen

Unit cost of screening in £

Lognormal(2.996, 0.693)

Equivalent to BMM

25.39

[5.19;77.53]

c vac

Unit cost of vaccination in £

Lognormal(5.011, 0.01)

Equivalent to BMM

150.02

[147.14;152.98]

c test

Unit cost of STI test in £

Lognormal(2.996, 0.03)

Equivalent to BMM

20.01

[18.83;21.19]

c blood

Unit cost of blood test in £

Lognormal(3.401, 0.03)

Equivalent to BMM

30

[28.26;31.79]

c treat

Unit cost of treatment in £

Lognormal(8.517, 0.015)

Equivalent to BMM

4999.78

[4853.56;5149.24]

c dis

Unit cost of disease treatment in £

Lognormal(9.210, 0.01)

Equivalent to BMM

9999.95

[9802.97;10198.10]

c gp

Unit cost of visit to general practitioner in £

Lognormal(3.912, 0.02)

Equivalent to BMM

50.01

[48.08;52.01]

u 2

Health utility of infected (min=0, max=1)

Beta(1469.3, 629.7)

Equivalent to BMM

0.70

[0.68;0.72]

u 3

Health utility of asymptomatic (min=0, max=1)

Beta(1439.4, 959.6)

Equivalent to BMM

0.60

[0.58;0.62]

u 4

Health utility of morbid (min=0, max=1)

Beta(629.7, 1469.3)

Equivalent to BMM

0.30

[0.28;0.32]

  1. The values are fictional and were chosen so as to produce most realistic prevalence outcome and cost-effectiveness results