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Fig. 1 | BMC Medical Research Methodology

Fig. 1

From: Development and demonstration of a state model for the estimation of incidence of partly undetected chronic diseases

Fig. 1

Chronic disease model with four states. Persons in the state Normal are healthy with respect to the disease under consideration. After onset of the disease, they change to state Undiagnosed and later to the state Diagnosed. The absorbing state Dead can be reached from all other states. The numbers of persons in the states and the transition rates depend on calendar time t and age a

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