Epidemology: study of patterns of disease and the various factors that affect the spread of disease
Incidence- no. of new cases in a population, occurring in a week, month, year
prevalence- no of people in a population with a disease at any given time
Mortality- no of people who have died of a certain this disease per week, month or year
Morbidity- no of people who are ill
Importance of Helath Stats
The patterns spotted by epidemologists can inidicate
- what causes diseases,
- how they are spread,
- where to target health education and care
- whether such programmes are succesfull.
It's a person physical, metal and social condition.
It may be good or poor
It's not only being free from disease but also feeling good with ourselves and have a positive outlook on life.
It's a disorder or malfunctioning of body that leads to a departure from good health
It might be acute (has a a sudden onset and lasts little time- INFLUENZA) or chronic (it lasts for months or years and most of the times is degenerative- BRONCHITIS)
It can affect body, mind or both
Some times, people may appear well but the lifestyle might put them at risk of getting it.
Categories of Disease
PHYSICAL- damage to body. Leprosy
MENTAL- affects minds with or without physical damage. Alzheimer's, Schzophfrenia, Claustrophobia
INFECTIOUS- it arises when organisms invade the body. Malaria, Flu
NON-INFECTIOUS- from any cause other than by invasion of organisms- Lung Cancer, Sickle call anaemia
INHERITED- it passes from parents to children on the genes (in DNA) - Sickle cell anaemia, cystoc fibrosis
DEFICIENCY- lack of nutrients, caused by poor diet. Night Blindness, Scurvy
DEGENERATIVE- gradual decline in funtion. Huntington's, Coronary heart disease
SOCIAL- caused by social environment or behaviour, such as poor housing, drug misuse. hypotermia, drug dependence
SELF INFLICTED- willingly caused by a person's own actions. Attempted suicide, Lung/skin cncer