I am trying to find out association between risk and disease (education and reporting of NCD) of populations in three different areas (i.e. in spatial context).There are six population groups. Each pair of population group belong to a particular neighborhood and each pair itself is made up of two population groups; one from higher and one from lower.In some cases Relative Risk is greater than 1  (significant) indicating causation. What can be the probable explanations if the value is not significant?

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