How many people suffer from Rosacea ?

Written by on June 29, 2010 in research with 0 Comments

One of the areas of research that attracts attention in the press and it also interesting to rosacea sufferers revolves around how many people have rosacea. The latest 2010 estimates from the NRS suggest that 16 million Americans suffer from rosacea, up from the last estimate of 14 million.

The incidence of rosacea is studied because there is a belief that the statistical analysis will reveal pearls of wisdom. This wisdom could come from such discoveries as a rosacea gene, clues from environmental factors or some statistical correlation with a population group for eg.

In the first of these 2 studies, from a small random group of 350 sufferers from a group of Estonian workers, researchers found that 22% had rosacea and 15% had frequent episodes of flushing without rosacea symptoms. This seems like quite a high incidence.

The second study looked at the symptoms of a group of Koreans who had already been diagnosed with rosacea, using the Rosacea Classification System to group features and found that almost all of the patients had the redness of rosacea, 1/2 had the papules and pustules of rosacea. There was a strong correlation between sun exposure and the redness of rosacea, but not the papules and pustules of rosacea, and in general the patients didn’t identify any factor that relieved their symptoms.

Prevalence of rosacea in an estonian working population using a standard classification.

Acta Derm Venereol. 2010 May;90(3):269-73.

Data about the prevalence of rosacea are scarce. The aim of this study was to evaluate the prevalence rate of rosacea according to the American National Rosacea Society Expert Committee (NRSEC) classification.

A cross-sectional study of 348 subjects randomly selected from a working population >or= 30 years of age was performed. All subjects completed a questionnaire. Skin status was examined according to NRSEC criteria.

Of the 348 subjects, 78 (22%) had one or more primary features of rosacea. The most common features were erythema (21%) and telangiectasia (18%). Of the subjects with rosacea, 78% had erythematotelangiectatic rosacea and 22% had papulopustular rosacea. Fifteen percent of the study subjects had experienced frequent episodes of flushing without permanent features of rosacea. No significant gender-related differences were found between study groups.

In conclusion, according to the NRSEC, rosacea is a more common skin condition over the age of 30 years than previously thought.

The following study could easily lead to rosacea sufferers thinking that they are destined to suffer from rosacea for around 3-4 years. Unfortunately the structure of the study doesn’t actually suggest that, but it seems to be a common belief – that rosacea has some kind of natural longevity.

Ann Dermatol. 2009 Aug;21(3):243-9. Epub 2009 Aug 31.

Clinical evaluation of 168 korean patients with rosacea: the sun exposure correlates with the erythematotelangiectatic subtype.

BACKGROUND: Although rosacea is a chronic cutaneous inflammatory disorder that’s commonly seen in adults, the etiology and pathogenesis of the illness remain unclear. A well established diagnostic classification and grading system may play a critical role in performing research and it would serve as a diagnostic reference in the clinical field.

OBJECTIVE: We sought to classify the patients with the new standard classification and grading system and we wanted determine the peculiar features and relationships of each subtype. We also analyzed the relationships between the degree of sun exposure and each subtype.

METHODS: We reviewed the medical records and clinical photos of 168 patients who were diagnosed with rosacea from 2002 to 2007 at our hospital. The standard classification and grading system suggested by the National Rosacea Society (NRS) Expert Committee was adopted to evaluate each patient’s subtype and the severity.

RESULTS: The male:female ratio was 1:2.29. The mean age at the time of diagnosis was 47.8 years. The mean duration of disease was 3.5 years. Sun exposure and hot baths/exercise were the two most common precipitating factors, while the majority of patients did not have any specific factor that relieved their symptoms. According to the NRS classification and grading system, the patients were classified into four subtypes. One hundred sixty two (96.4%) patients were diagnosed with the erythematotelangiectatic subtype irrespective of severity. Eighty five (50.6%) patients had the papulopustular subtype and 24 (14.3%) patients had ocular rosacea. Eight (4.8%) patients displayed mild phymatous change. The degree of sun exposure had significant correlation with the development and severity of the erythematotelangiectatic subtype (p<0.05), while it had no correlation with the papulopustular, ocular and phymatous subtypes.

CONCLUSION: Although the erythematotelangiectatic subtype was the most common subtype of rosacea, many patients also had other subtypes of rosacea simultaneously. Based on our results, we proved that ocular rosacea is an extension of the clinical spectrum of erythematotelangiectatic rosacea. In addition, the results of our study particularly suggest that sun exposure has a different influence on each subtype of rosacea.

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About the Author: David Pascoe started the Rosacea Support Group in October 1998. .

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