Table 3 Timeliness of a spatio-temporal Bayesian mixed effects regression model at detecting a simulated outbreak in 15 different gastrointestinal disease outbreak scenarios, at a reporting threshold l = 0.

From: A real-time spatio-temporal syndromic surveillance system with application to small companion animals

Spatial geometry

Extent

Severity (fraction of GI cases)

Timeliness (days to detection since start of outbreak)

Sparse

Confined to central premise

0.1

2

Sparse

Confined to central premise

0.15

1

Sparse

Confined to central premise

0.2

0

Medium

Confined to central premise

0.1

NA

Medium

Confined to central premise

0.15

1

Medium

Confined to central premise

0.2

0

Dense

Confined to central premise

0.1

1

Dense

Confined to central premise

0.15

1

Dense

Confined to central premise

0.2

0

Medium

Extending to neighbouring premises

0.1

1

Medium

Extending to neighbouring premises

0.15

0

Medium

Extending to neighbouring premises

0.2

0

Dense

Extending to neighbouring premises

0.1

1

Dense

Extending to neighbouring premises

0.15

1

Dense

Extending to neighbouring premises

0.2

0

  1. In one scenario (NA: not applicable) timeliness could not be calculated because no outbreak was detected.