Table 3 Quarterly comparison of respiratory pathogens before, during, and after the epidemic
|  | Before NPI implementation (431) | During NPI implementation (434) | After NPI release (319) | χ2 Value | P Value |
|---|---|---|---|---|---|
The first quarter | 88 (20.4) | 87(20.0) | 11(3.4)ab | 12.336 | 0.002 |
The second quarter | 19(4.4) | 40(9.2)a | 42(13.2)a | 24.617 | 0.000 |
The third quarter | 9(2.1) | 18(4.1) | 60(18.8)ab | 45.785 | 0.000 |
The fourth quarter | 44(10.2) | 90(20.7)a | 105(32.9)ab | 35.651 | 0.000 |