TABLE II.
Percentage and p-value Chi-square analyzing the association between the predominance of types of sound and city size categories, before and during the lockdown. Statistically significant values (p < 0.05) are highlighted in gray.
| Type of sounds | Before lockdown | During lockdown | ||||||
|---|---|---|---|---|---|---|---|---|
| CAT I | CAT II | CAT III | p-value | CAT I | CAT II | CAT III | p-value | |
| Mechanical | 68% | 80% | 85% | <0.01 | 10% | 12% | 12% | 0.79 |
| Biological | 59% | 36% | 24% | <0.01 | 88% | 83% | 77% | <0.01 |
| Environmental | 41% | 31% | 20% | <0.01 | 65% | 70% | 54% | <0.01 |
| Human | 44% | 44% | 41% | 0.45 | 49% | 45% | 53% | 0.03 |
| Tech | 34% | 32% | 31% | 0.67 | 37% | 32% | 33% | 0.45 |