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Adaptive Likelihood Ratio Scans for the Detection of Space-Time Clusters

In: Handbook of Scan Statistics

Author

Listed:
  • Max S. de Lima

    (Universidade Federal do Amazonas, Department of Statistics)

  • Luiz H. Duczmal

    (Universidade Federal de Minas Gerais, Campus Pampulha, Department of Statistics)

Abstract

This work presents a methodology to detect space-time clusters, based on adaptive likelihood ratios (ALRs), which preserves the martingale structure of the regular likelihood ratio. Monte Carlo simulations are not required to validate the procedure’s statistical significance, because the upper limit for the false alarm rate of the proposed method depends only on the quantity of evaluated cluster candidates, thus allowing the construction of a fast computational algorithm. The quantity of evaluated clusters is also significantly reduced, by using another adaptive scheme to prune many unpromising clusters, further increasing the computational speed. Performance is evaluated through simulations to measure the average detection delay and the probability of correct cluster detection. Applications for thyroid cancer in New Mexico and hanseniasis in children in the Brazilian Amazon are shown.

Suggested Citation

  • Max S. de Lima & Luiz H. Duczmal, 2024. "Adaptive Likelihood Ratio Scans for the Detection of Space-Time Clusters," Springer Books, in: Joseph Glaz & Markos V. Koutras (ed.), Handbook of Scan Statistics, chapter 2, pages 11-40, Springer.
    • Handle: RePEc:spr:sprchp:978-1-4614-8033-4_37
    DOI: 10.1007/978-1-4614-8033-4_37
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