What are patterns and trends of health and illness in different social groups?

age: ollder people are more prone to illnesses whereas the younger ones aren't

social class: lower class people can't afford Private treatment which leads to ill-health whereas the upper class can afford it which leads to good health because they can afford treatment

gender: women get less pay and have extra work to do which can led to stress and more ill-health problems whereas men have the same job but get paid higher and have better income than women