SHS exposure at home in the past 7 days |
None | 89.8 | 86.0 | <0.001 | 86.9 | <0.001 |
1–3 days | 4.8 | 6.4 | 0.003 | 6.8 | 0.001 |
4–7 days | 5.4 | 7.7 | <0.001 | 6.4 | 0.03 |
Any days | 10.2 | 14.1 | <0.001 | 13.2 | <0.001 |
|
SHS exposure outside home in the past 7 days |
None | 80.2 | 72.8 | <0.001 | 72.7 | <0.001 |
1–3 days | 14.3 | 17.9 | <0.001 | 19.4 | <0.001 |
4–7 days | 5.5 | 9.4 | <0.001 | 8.0 | <0.001 |
Any days | 19.8 | 27.2 | <0.001 | 27.4 | <0.001 |
|
SHS exposure anywhere in the past 7 days |
None | 76.8 | 68.8 | <0.001 | 68.9 | <0.001 |
1–3 days | 14.4 | 18.0 | <0.001 | 18.4 | <0.001 |
4–7 days | 8.8 | 13.1 | <0.001 | 12.7 | <0.001 |
Any days | 23.2 | 31.2 | <0.001 | 31.1 | <0.001 |
|
Smoking status of parents |
Father only | 29.5 | 27.6 | 0.60 | 27.4 | 0.61 |
Mother only | 1.6 | 2.1 | 0.08 | 1.7 | 0.46 |
Both | 5.0 | 4.7 | 0.86 | 4.7 | 0.72 |
None | 63.9 | 65.0 | 0.94 | 66.2 | 0.69 |
|
Places of SHS exposure outside home in the past 30 days |
Streets | – | 34.4 | N/A | 35.6 | N/A |
Parks | – | 15.4 | N/A | 15.8 | N/A |
Restaurants | – | 13.4 | N/A | 12.3 | N/A |
Bus stops | – | 12.7 | N/A | 12.7 | N/A |
Subways | – | 9.5 | N/A | 10.0 | N/A |
Wash rooms | – | 9.2 | N/A | 9.8 | N/A |
Shopping malls | – | 8.0 | N/A | 7.7 | N/A |
Playgrounds | – | 7.7 | N/A | 7.3 | N/A |
Others' homes | – | 6.0 | N/A | 6.6 | N/A |
|
Respiratory symptoms |
Yes | 36.6 | 38.5 | <0.001 | 38.4 | <0.001 |