Variable | Baotou | Beijing | ||
---|---|---|---|---|
rs | P-value | rs | P-value | |
Age | 0.195 |  < 0.001 | 0.009 | 0.766 |
Sex | – | 0.478 | – | 0.514 |
Allergic or not | – |  < 0.001 | – | 0.004 |
Family history of allergy | – | 0.010 | – | 0.990 |
Smoking history | – | 0.062 | – | 0.074 |
With asthma | – | 0.049 | – | 0.005 |