Table 5
Factors warranting study for possible association with susceptibility to adverse health effects of air pollution
| Category | Examples |
| Genetic | Fibrinogen polymorphisms |
| Previous exposure | Tobacco smoking |
| Classic risk factors | Plasma fibrinogen, LDL cholesterol |
| Pre-existing symptoms | Angina (WHO), chronic bronchitis (MRC) |
| Impaired function | Reduced spirometric values |
| Confirmed disease | Myocardial infarction, bronchial asthma |
| Previous emergency admission | Ischaemic heart disease, obstructive lung disease |
| Other factors | Age, socioeconomic status |
