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Table 1 Parameter values describing the parsimonious model

From: Modelling the force of infection for hepatitis B and hepatitis C in injecting drug users in England and Wales

Model Parameters HBV 95% C. I. HCV 95% C. I. Global 95% C. I.
g(t) trend in the FOI by year 1999–2003       
1999–2003 0.1079 (0.0840–0.1327) 0.1608 (0.1314–0.1942)   
h(τ) trend in the FOI by injecting career length       
<1 1 fixed Same as HBV   
1+ 0.3272 (0.2359–0.4443) Same as HBV   
HBV background prevalence b      0 (0.0–0.0161)
Frailty θ      0.6566 (0.5305–0.8224)
  U -0.132   -2.524    
  V 0.117   0.026    
  W 63.99   77.52    
  Z 295.5   19.49