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					Tutorial 2

SatScan Tutorial


The analysis of clustering of cancer cases is of great importance.
On Blackboard (USC) or the http://people.musc.edu/~abl6 folder, are some data files
that can be used with SatScan




1) Lancashire larynx cancer (1974-1983)

file: larynx.cas



                  42900


                  42700


                  42500


                  42300
       northing




                  42100


                  41900


                  41700


                  41500


                  41300


                  41100
                          34800   35000   35200   35400   35600   35800   36000   36200

                                                  easting




Figure 1 Larynx cancer case map


Control case event data set: Lung cancer

File: lung.ctl
                 43100
                 42900
                 42700
                 42500
      northing



                 42300
                 42100
                 41900
                 41700
                 41500
                 41300
                 41100

                         34500   34900   35300    35700    36100   36500
                             34700   35100    35500    35900   36300
                                             easting



Figure 2 Lung cancer control event map


We also need a geography file that contains the coordinates of the points in the case and
control files.
File : lancgeog.geo


a) Run SatScan with an appropriate model to find areas of clustering

b) Interpret the results:
     are there primary and secondary clusters?
     Where are they located?
     What are their significance?



2) Add a new grid file to SatScan with a single point (3.5450,4.1400).
Carry out an analysis using this file.

           a) what analysis has been performed?
           b) interpret the results and compare them to the results of 1) above

				
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posted:8/13/2011
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