1. Injuries and Injury Prevention in Infants and Children

2. Injury Definition Tissue damage resulting from acute exposure (inadvertent or deliberate) to physical or chemical agents (e.g., kinetic or thermal energy, water, toxic substances).

3. Epidemiology Study of health problems in populations.

4. Epidemiological Factors Relevant to Injury Age Sex Ethnicity Other host factors (e.g., substance abuse)

5. Epidemiological Outcome Measures Mortality: age-specific death rates (number of deaths/unit of population/year) Morbidity: number of persons injured, number of days of work/school missed, number of days in hospital

6. Age and Injury Mortality Rate

7. Sex and Injury Mortality Ratios