Summary adjustment strategies of the unified model approach.

<p>Tangará da Serra-MT, Brazil, 2008.</p><p>*Simple arithmetic average; **Averages weighed by the inverse of their variances; *** Change in PEF for an increase of 10 µg/m<sup>3</sup> in PM<sub>10</sub>lag1; n – Number of cases; <sup>⊥</sup>Parametric Splines.</p>