Forecasting epidemic pathways for measles in Iceland: the use of simultaneous equation and logit models

Six measles transmission chains between pairs and triplets of medical districts in Iceland are identified using monthly data for the 26 years from 1945 to 1970. The years studied are divided into two halves, a calibration period (1945-1957) and a forecast period (1958-1970). Some simultaneous equati...

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Bibliographic Details
Published inEcology of disease Vol. 2; no. 4; p. 377
Main Authors Cliff, A D, Haggett, P, Ord, J K
Format Journal Article
LanguageEnglish
Published England 1983
Subjects
Disease Outbreaks - prevention & control
Forecasting
Humans
Iceland
Measles - transmission
Models, Theoretical
Iceland
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Summary:Six measles transmission chains between pairs and triplets of medical districts in Iceland are identified using monthly data for the 26 years from 1945 to 1970. The years studied are divided into two halves, a calibration period (1945-1957) and a forecast period (1958-1970). Some simultaneous equation models of the chains are developed and fitted using three-stage least squares. The resulting one month ahead forecasts are presented in terms of the expected case levels and as the probability of epidemics occurring. A single equation probability model using a logistic transformation is then formulated and compared with the simultaneous equation approach. The results obtained from the Icelandic study confirm in practice the advantages theoretically expected from setting up forecasting models containing geographically based chain transmission components.
ISSN:0278-4300