The 'EpiEnlist' project: a dermo-epidemiologic study on a representative sample of young Italian males. Prevalence of selected pigmentary lesions.

BACKGROUND

Few studies on the prevalence and incidence of many skin conditions in the general population are available because it is difficult to submit to dermatologic examination large samples of seemingly healthy population.

OBJECTIVE

The aim of this study was to estimate the prevalence of several skin conditions among a sample that is deemed to be representative of the general population of young men living in southern Italy.

PATIENTS/

METHODS

Potential conscripts resident in the coastal regions of southern Italy and called at the age of 18 to the Draft's Council Medical Unit in Taranto underwent a clinical and instrumental examination to evaluate their psycho-physical fitness to compulsory service in Italian Navy. From January 1998 to April 2004 a dermo-epidemiologic project named EpiEnlist (EPIdemiology in ENLISTed Men) project was carried out by the Department of Dermatology of the Italian Navy Hospital in Taranto under the auspices of the Italian Group for Epidemiological Research in Dermatology. All the subjects showing skin lesions evocative of neurofibromatosis (NF), congenital melanocytic nevus (CMN), Becker nevus (BN), and vitiligo were referred to the Department of Dermatology of the Italian Navy Hospital for confirming the diagnosis. The confirmed cases were recorded in a predefined patient's card, containing the main anamnestic, clinical, instrumental, and laboratory data.

RESULTS

Because the recording of the various conditions started and ended in different times, the total number of examined subjects varied. NF type 1 was diagnosed in 6 of 34 740 subjects [prevalence 1:5735 or 0.017%; 95% confidence interval (95% CI), 0.0008-0.0037], CMN in 157 of 23 354 (prevalence 1:148 or 0.67%; 95% CI, 0.57-0.79). BN was observed in 70 of 27 954 young men (prevalence 1:399 or 0.25%; 95% CI, 0.15-0.35), and its mean age of appearance was 11.9 years (minimum 5-maximum 17). In 41 subjects (58.6%), the age of appearance was over 10 years. Vitiligo was recorded in 60 of 34 740 persons (prevalence 1:579 or 0.17%; 95% CI, 0.13-0.22). In 40 subjects with vitiligo, the blood test was done: in 40% of these circulating autoantibodies, mainly anti-thyroid (25.6%) and anti-smooth muscle (17.3%) autoantibodies were detected, but only in 5% of cases, a thyroid disease was diagnosed, and no other sign of autoimmune diseases was observed.

CONCLUSIONS

The epidemiological data of the skin conditions considered in the present study can be considered roughly in agreement with those reported in the available surveys. Because they were obtained in a large sample of Italian young males from the general population, they can be useful for therapeutic and preventive interventions by the public health organizations.