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Orphanet J Rare Dis. 2014 Jan 6;9:1. doi: 10.1186/1750-1172-9-1.

Prevalence of inherited ichthyosis in France: a study using capture-recapture method.

Author information

1
Reference Centre for Rare Skin Diseases, Dermatology Department, Larrey Hospital, CHU Toulouse, Toulouse, France. dreyfus.i@chu-toulouse.fr.

Abstract

BACKGROUND:

Inherited ichthyoses represent a group of rare skin disorders characterized by scaling, hyperkeratosis and inconstant erythema, involving most of the tegument. Epidemiology remains poorly described. This study aims to evaluate the prevalence of inherited ichthyosis (excluding very mild forms) and its different clinical forms in France.

METHODS:

Capture - recapture method was used for this study. According to statistical requirements, 3 different lists (reference/competence centres, French association of patients with ichthyosis and internet network) were used to record such patients. The study was conducted in 5 areas during a closed period.

RESULTS:

The prevalence was estimated at 13.3 per million people (/M) (CI95%, [10.9 - 17.6]). With regard to autosomal recessive congenital ichthyosis, the prevalence was estimated at 7/M (CI 95% [5.7 - 9.2]), with a prevalence of lamellar ichthyosis and congenital ichthyosiform erythroderma of 4.5/M (CI 95% [3.7 - 5.9]) and 1.9/M (CI 95% [1.6 - 2.6]), respectively. Prevalence of keratinopathic forms was estimated at 1.1/M (CI 95% [0.9 - 1.5]). Prevalence of syndromic forms (all clinical forms together) was estimated at 1.9/M (CI 95% [1.6 - 2.6]).

CONCLUSIONS:

Our results constitute a crucial basis to properly size the necessary health measures that are required to improve patient care and design further clinical studies.

PMID:
24393603
PMCID:
PMC3892037
DOI:
10.1186/1750-1172-9-1
[Indexed for MEDLINE]
Free PMC Article
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