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Pearson’s correlation coefficient index among the mobility index (MI) and the percentage of change of contaminants for the period of time (February 15–August 31)
| NO2 | O3 | PM10 | |
|---|---|---|---|
| Pearson’s correlation coefficient | Pearson’s correlation coefficient | Pearson’s correlation coefficient | |
| Gràcia | + 0.51 | − 0.56 | + 0.41 |
| Vall d’Hebron | + 0.38 | − 0.41 | + 0.33 |
