Table 1 Parameters of tuberculosis transmission models
From: Interpreting measures of tuberculosis transmission: a case study on the Portuguese population
Symbol | Definition | Value |
|---|---|---|
β | Transmission coefficient | variable (yrs−1) |
ν | Proportion of pulmonary TB cases | 0.75 |
μ | Death and Birth rate | 1/80 yrs−1 |
δ | Rate at which individuals leave P compartment | 2 yrs−1 |
ϕ | Fraction of infected population developing active TB | 0.05 |
σ | Reinfection factor | 0.5 |
ω | Rate of endogenous reactivation | 0.0003 yrs−1 |
τ | Inverse of time to detection | 4.26 yrs−1 |
κ | Proportion of detected cases in a year | 0.87 |
δ T | Inverse of treatment length | 1.36 yrs−1 |
ϕ T | Fraction of treatment default and failure | 0.04 |
α a | Low-risk factor | 0.15 or variable |
γ a | Proportion of low-risk group | 0.98 or variable |