Prevalence and Incidence of Dandruff
Prevalance of Dandruff:
50 million ... see also overview of Dandruff.
Prevalance Rate:
approx 1 in 5 or 18.38% or 50 million people in USA [Source statistic for calcuation: "50 million" -- see also general information about data sources]
Dandruff Prevalence: Book Excerpts
More Statistics about Dandruff:
Hospitalization statistics
All statistics for Dandruff
Prevalence/Incidence of Dandruff: Online Medical Books
16 MEDICAL BOOKS ONLINE!
Review excerpts from medical books online, free, without registration,
for more information about the prevalence and/or incidence of Dandruff.
Dermatitis:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
The cause of atopic dermatitis is unknown, but a genetic predisposition may be exacerbated by such factors as food allergies, infections, irritating chemicals, temperature and humidity, and emotions. Approximately 10% of childhood cases are due to allergy to certain foods, particularly eggs, peanuts, milk, fish, soy, and wheat. Atopic dermatitis tends to flare up in response to extremes in temperature and humidity. Other causes of flare-ups are sweating and psychological stress.
An important secondary cause of atopic dermatitis is irritation, which seems to change the epidermal structure, allowing immunoglobulin (Ig) E activity to increase. Consequently, chronic skin irritation usually continues even after exposure to the allergen has ended or after the irritation has been systemically controlled.
Atopic dermatitis is most common in infants, usually developing between ages 1 month and 1 year, commonly in those with strong family histories of atopic disease. At least half of those cases clear by age 36 months. These children often acquire other atopic disorders as they grow older. Typically, this form of dermatitis flares and subsides repeatedly before finally resolving during adolescence. However, it can persist into adulthood. In adults, it’s generally chronic or recurring.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Seborrheic Dermatitis:
Seborrheic Dermatitis - epidemiology
(The 5-Minute Pediatric Consult)
- There are 2 populations in whom seborrheic dermatitis develops: Infants, in which seborrheic dermatitis usually develops after the 1st 3–4 weeks of life, peaks at age 3 months, and usually resolves by 1 year of age; and adolescents and adults, in whom it usually persists.
- In adults, seborrheic dermatitis is more common in males.
- The development of seborrheic dermatitis during infancy does not predict the development of adolescent and/or adult disease.
Seborrheic Dermatitis - incidence
Although it is one of the more common skin diseases seen in infants as well as in adolescents and adults, the incidence of seborrheic dermatitis is unknown.
Seborrheic Dermatitis - prevalence
- Affects 2–5% of the adult population.
- Affects 18% of infants <2 years of age.
>
» READ BOOK EXCERPT ONLINE »
Source: The 5-Minute Pediatric Consult, 2008
About prevalence and incidence statistics:
The term 'prevalence' of Dandruff usually refers to the estimated population
of people who are managing Dandruff at any given time.
The term 'incidence' of Dandruff refers to the annual diagnosis rate,
or the number of new cases of Dandruff diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.
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