Table 2 Summary of parameters used during outbreak simulation. Unless otherwise indicated, default values were used for simulation. Sensitivity analyses were also conducted for each parameter within the ranges shown.

From: Simulation and identification of foodborne outbreaks in a large supermarket consumer purchase dataset

Outbreak parameter

Default value

Sensitivity analysis range

Background proportion

0.2

0–0.9

Attack rate

0.01

0.001–0.1

Delay

50 days

0–300 days

Outbreak length

50 days

Item purchase frequency

Randomly selected

0–25th, 25th–75th, 97th percentiles