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Table 1 Statistical Analysis of Spatial Extent of 911 Alarms (n = 86)

From: Automated surveillance of 911 call data for detection of possible water contamination incidents

 

Alarm Area (km2)

Number of Calls

Density (calls/km2)

Average

9.22

9

28.54

Minimum

< 0.00031

3

0.08

Maximum

253.21

34

995.22

  1. 1 The minimum alarm area was less than SaTScan's™ minimum distance threshold (minimum radius = 0.01 km) which translates to a minimum alarm area of 0.0003 km2.
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International Journal of Health Geographics

ISSN: 1476-072X