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Table 3 Description of all significant vomiting clusters (p ≤ 0.05) detected by the scan statistic during our test period (23 October 2005 to 21 May 2006)

From: Tracking the spatial diffusion of influenza and norovirus using telehealth data: A spatiotemporal analysis of syndromic data

Year Week Location Number of PCTs involved Observed calls (O) Expected calls (E) O/E p-value
   (centroid PCT) (radius in km)   [based on control period]   
2005 40 Portsmouth City Teaching 11 (81) 229 171 1.34 0.006
  46 East and North Hertfordshire 9 (33) 121 80 1.52 0.002
  49 Suffolk 31 (113) 367 292 1.26 0.004
  50 Luton 4 (22) 85 47 1.79 0.001
  51 Bedfordshire 5 (37) 147 86 1.7 0.001
  51 Hounslow 41 (59) 811 687 1.19 0.001
  52 Eastern and Coastal Kent 59 (167) 1354 1204 1.12 0.007
2006 01 Hammersmith and Fulham 43 (64) 744 612 1.22 0.001
  02 Suffolk 36 (115) 525 412 1.27 0.001
  03 Bexley 56 (113) 896 737 1.21 0.001
  04 Great Yarmouth and Waveney 29 (165) 429 331 1.29 0.001
  04 Milton Keynes 55 (93) 799 688 1.16 0.009
  05 South Gloucestershire 65 (161) 1023 860 1.19 0.001
  05 Brighton and Hove City 46 (97) 789 662 1.19 0.001
  05 Cambridgeshire 74 (144) 1177 1046 1.12 0.009
  06 Southampton city 44 (116) 822 689 1.19 0.002
  06 Bedfordshire 26 (67) 480 394 1.22 0.007
  07 East and North Hertfordshire 18 (41) 293 214 1.37 0.001
  09 Bedfordshire 11 (52) 249 183 1.36 0.002
  10 East and north Hertfordshire 12 (37) 241 164 1.47 0.001
  10 Newcastle 8 (46) 156 108 1.45 0.002
  12 Great Yarmouth and Waveney 31 (167) 469 370 1.27 0.001
  1. PCT, Primary Care Trust