Potential risk sites and their relationship with dengue cases, Campinas municipality, Southeast Brazil.

If we consider the ordered relative risks of the regions according to their distances to the source, the test is as follows [ 35 ]: (5) M a x i ∑ j = 1 i O j ∑ j = 1 i E j The null hypothesis is that relative risks are constant across space, while the alternative is that there is a decreasing trend in relative risk as distance to the putative source increases [ 42 ].

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