Impacts of mining disasters on the ambulatory care of the Brazilian national health system: the cases of Mariana and Brumadinho/Brazil.

When analyzing the approved values, there was an increasing trend in the previous period ( p = 0.033), soon after there was no significant change ( p = 0.254) and no significant change in the pattern in the later period ( p = 0.155), although apparently there is a breakpoint on the day of the disaster, which is not significant (Fig. 4 ).

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