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Concentration of Der p1 in the air of the different places before and after starting of air-conditioner
| Group | n | Before starting | After starting | d̅±sd | Paired t value | P value |
|---|---|---|---|---|---|---|
| dining room | 10 | 6.943±1.649 | 9.366±2.081 | 2.423±2.899 | 2.643 | <0.05 |
| shopping malls | 10 | 4.485±1.510 | 6.676±1.684 | 2.191±2.778 | 2.494 | <0.05 |
| hotels | 10 | 5.246±1.453 | 7.224±1.690 | 1.978±2.702 | 2.315 | <0.05 |
| residents | 10 | 5.878±1.438 | 8.022±1.888 | 2.144±2.538 | 2.672 | <0.05 |
