Research Article
Foetal Exposure to Maternal Passive Smoking Is Associated with Childhood Asthma, Allergic Rhinitis, and Eczema
Table 1
Baseline characteristics of survey participants ().
| | Number | (%) |
| Age group, years | | | 0-1 | 548 | 7.41 | 2–5 | 1433 | 19.38 | 6–10 | 2755 | 37.26 | 11–14 | 2657 | 35.94 | Sex | | | Female | 3554 | 48.07 | Male | 3839 | 51.93 | Highest education level of parents | | | No and primary | 660 | 9.05 | Secondary and matriculation | 5344 | 73.29 | Tertiary | 1288 | 17.66 | Perinatal and postnatal problem | | | Yes | 1044 | 14.12 | No | 6349 | 85.88 | Current parent smoking | | | No | 5404 | 73.10 | Yes | 1989 | 26.90 | Total no. of household smokers | | | 0 | 5298 | 71.66 | 1 | 1796 | 24.29 | ≥2 | 299 | 4.04 | Family history of asthma | | | Yes | 199 | 2.69 | No | 7194 | 97.31 | Family history of atopy | | | Yes | 612 | 8.28 | No | 6781 | 91.72 | Respondents | | | Father | 2127 | 28.77 | Mother | 5266 | 71.23 | Birth place | | | Hong Kong | 6556 | 88.68 | Non-Hong Kong | 837 | 11.32 | Mode of delivery | | | Normal spontaneous delivery + other vaginal | 5869 | 79.39 | Cesarean delivery | 1390 | 18.80 | Missing | 134 | 1.81 | Current primary carer | | | Father | 523 | 7.07 | Mother | 5755 | 77.84 | Other | 1115 | 15.08 |
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