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Table 3 Changes in dispersion pattern analysis in anopheline-positive habitat distribution across seasons and years.

From: Temporal and spatial stability of Anopheles gambiae larval habitat distribution in Western Kenya highlands

Comparison

Ratio of long to long axis

Ratio of short to short axis

Ratio of the approximate areas of the two ellipses

Difference in the angles of the two long axes

Variation in dispersion patterns between the rainy and dry seasons within a year

   2003

1.2

0.9

1.1

4.8

   2004

1

1

1

77.5

   2005

1.1

1.3

1.4

-0.5

Inter-annual variation in dispersion patterns

   February 2003-2004

1.1

0.9

1

-12.4

   February 2004-2005

1

1

1

-5.4

   February 2003-2005

1.1

0.9

1

-17.8

   May 2003-2004

0.9

1

0.9

60.3

   May 2004-2005

1.1

1.4

1.6

-83.4

   May 2003-2005

1

1.3

1.4

-23.1