Over the period studied, there were significant differences
between months in GII (% annual mean ± se=
7.7928±0.24) considering the sexes separately and over
the total population (Kruskal-Wallis test, p<0.01), although
there was no clear trend. The lowest values occurred
in certain winter months (January, March) and late
summer (August, September, October) and the maximum
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