Prevalence and Incidence of Sjogren's Syndrome
Prevalance of Sjogren's Syndrome:
1 to 4 million people with Sjogren’s Syndrome (NIAMS) ... see also overview of Sjogren's Syndrome.
Prevalance Rate:
approx 1 in 272 or 0.37% or 1 million people in USA [Source statistic for calcuation: "1 to 4 million people with Sjogren’s Syndrome (NIAMS)" -- see also general information about data sources]
Sjogren's Syndrome: Rare Disease
Sjogren's Syndrome is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Sjogren's Syndrome, or a subtype of Sjogren's Syndrome,
affects less than 200,000 people in the US population.
Ophanet, who are a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Sjogren's Syndrome as a "rare disease".
More information about Sjogren's Syndrome is available from Orphanet
Sjogren's Syndrome Prevalence: Book Excerpts
Undiagnosed prevalence of Sjogren's Syndrome:
estimated 2 million ... see also misdiagnosis of Sjogren's Syndrome.
Undiagnosed prevalence rate:
approx 1 in 136 or 0.74% or 2 million people in USA [about data] ... Note: this rate calculation uses the following statistic: estimated 2 million
Prevalance of Sjogren's Syndrome:
Experts believe 1 to 4 million people have the disease.
(Source: excerpt from Questions and Answers About Sjögren's Syndrome: NIAMS)
Prevelance statistics for Sjogren's Syndrome:
The following statistics relate to the prevalence of Sjogren's Syndrome:
- 90% of cases of Sjogren’s Syndrome occurs in women in the US (NIH, The National Women’s Health Centre, 2004)
- 1 to 4 million cases of Sjogren’s Syndrome in the US (NIH, The National Women’s Health Centre, 2004)
- Dry eye prevalence of about 10 million (some due to Sjogren's)
- more statistics...»
Prevalence/Incidence of Sjogren's Syndrome: 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 Sjogren's Syndrome.
Conjunctivitis:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
The most common causative organisms include:
❑ bacterial — Staphylococcus aureus, Streptococcus pneumoniae, Neisseria gonorrhoeae, Neisseria meningitidis
❑ chlamydial — Chlamydia trachomatis (inclusion conjunctivitis)
❑ viral — adenovirus types 3, 7, and 8; herpes simplex virus, type 1.
Other causes include allergic reactions to pollen, grass, topical medications, air pollutants, smoke, or unknown seasonal allergens (vernal conjunctivitis); environmental (wind, dust, and smoke) and occupational irritants (acids and alkalies); and a hypersensitivity to contact lenses or solutions.
Vernal conjunctivitis (so-called because symptoms tend to be worse in the spring) is a severe form of immunoglobulin E-mediated mast cell hypersensitivity reaction. This form of conjunctivitis is bilateral. It usually begins at age 3 to 5 years and persists for about 10 years. It’s sometimes associated with other signs of allergy commonly related to pollens, asthma, and allergic rhinitis.
Epidemic keratoconjunctivitis is an acute, highly contagious viral conjunctivitis caused by adenovirus types 8 and 19. It’s commonly complicated by visual loss due to corneal subepithelial infiltrates. Health care providers must be careful to wash their hands and sterilize equipment to prevent the spread of this disease.
In the Western hemisphere, conjunctivitis is probably the most common eye disorder.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Inclusion conjunctivitis:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
C. trachomatis is an obligate intracellular organism of the lymphogranuloma venereum serotype group. Serotypes D through K are sexually transmitted, and secondary eye involvement in adults occurs in about 1 in 300 genital cases. Because contaminated cervical secretions infect the eyes of the neonate during birth, inclusion conjunctivitis is an important cause of ophthalmia neonatorum. Ocular chlamydial disease occurs most frequently in adults between ages 18 and 30.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Sjögren's syndrome:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
The cause of Sjögren’s syndrome is unknown, but genetic and environmental factors probably contribute to its development. Viral or bacterial infection or perhaps exposure to pollen may trigger Sjögren’s syndrome in a genetically susceptible individual. Tissue damage results from infiltration by lymphocytes or from the deposition of immune complexes. Lymphocytic infiltration may be classified as benign, malignant, or pseudolymphoma (nonmalignant, but tumorlike aggregates of lymphoid cells).
This syndrome occurs mainly in females (90% of patients); mean age of onset is 40 to 50.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
About prevalence and incidence statistics:
The term 'prevalence' of Sjogren's Syndrome usually refers to the estimated population
of people who are managing Sjogren's Syndrome at any given time.
The term 'incidence' of Sjogren's Syndrome refers to the annual diagnosis rate,
or the number of new cases of Sjogren's Syndrome 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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