Can incidence be lower than prevalence?

It is also possible for a disease to have a high prevalence but low incidence if for example you were to take the case of an infection which is incurable (or long lasting) but does not readily kill, and then develop a highly effective vaccine.

Does prevalence increase with incidence?

if the incidence of disease remains constant, but the rate of death from the disease or the rate of cure increases, then prevalence (fullness of the basin) will decline. If incidence remains constant, but the lives of prevalent cases are prolonged, but they aren’t cured, then the prevalence will rise.

Is prevalence usually equal to incidence?

Prevalence differs from incidence proportion as prevalence includes all cases (new and pre-existing cases) in the population at the specified time whereas incidence is limited to new cases only.

What is the difference between incident and prevalent cases?

Incidence contrasts with prevalence, which includes both new and existing cases. For example, a person who is newly diagnosed with diabetes is an incident case, whereas a person who has had diabetes for 10 years is a prevalent case.

Is prevalence always higher than incidence?

Prevalence is based on both incidence and duration of illness. High prevalence of a disease within a population might reflect high incidence or prolonged survival without cure or both. Conversely, low prevalence might indicate low incidence, a rapidly fatal process, or rapid recovery.

Is prevalence a percentage?

Prevalence may be reported as a percentage (5\%, or 5 people out of 100), or as the number of cases per 10,000 or 100,000 people. The way prevalence is reported depends on how common the characteristic is in the population.

What is the relationship between incidence and prevalence?

Prevalence and incidence are frequently confused. Prevalence refers to proportion of persons who have a condition at or during a particular time period, whereas incidence refers to the proportion or rate of persons who develop a condition during a particular time period.

When do you use prevalence and incidence?

The important distinction to make, therefore, between incidence and prevalence is the consideration of time – prevalence represents the current or past state of a population, whilst incidence allows for the prediction of future events within a population.

What is the difference between incidence rate and incidence proportion?

Incidence rate takes the perspective of what is happening from moment to moment (or year to year). Incidence proportion takes the perspective of what happens over an accumulation of time (hence the synonym “cumulative” incidence).

What is the difference between incidence and prevalence?

Prevalence is the proportion of a population that has a condition at a specific time, but the prevalence will be influenced by both the rate at which new cases are occurring and the average duration of the disease. Incidence reflects the rate at which new cases of disease are being added to the population (and becoming prevalent cases).

What is the difference between high prevalence and low prevalence?

High prevalence of a disease within a population might reflect high incidence or prolonged survival without cure or both. Conversely, low prevalence might indicate low incidence, a rapidly fatal process, or rapid recovery.

Is there such a thing as a high incidence of disease?

Even in a situation of low incidence of a disease in a population, there can be pockets with high incidence that are a cause of concern for the scientists.

Can the effect on prevalence of a disease be predicted?

The effect on prevalence cannot be predicted from the information given. If the prevalence of a disease has been more or less constant for the past ten years (i.e., new cases have been balanced by cures or deaths of prevalent cases), what would be the effect if a large number of healthy people immigrated into the population? a.