Subacute sclerosing panencephalitis in Italy. An epidemiological study

Area of Science:

• Epidemiology
• Neurology
• Public Health

Background:

• Subacute sclerosing panencephalitis (SSPE) is a rare, progressive neurological complication of measles virus infection.
• Previous studies suggest higher than expected SSPE incidence in Mediterranean countries.

Purpose of the Study:

• To investigate the epidemiological characteristics of SSPE in Italy between 1972-1981.
• To identify geographical and demographic variations in SSPE incidence.

Main Methods:

• Retrospective epidemiological study analyzing 207 SSPE cases with onset during 1972-1981.
• Calculation of incidence rates per million total population (CYMTP) and young population aged 0-19 years (CYMYP).
• Analysis of demographic data, including age at onset, age at measles infection, and male/female ratios.

Main Results:

• Mean incidence rates were 0.37 CYMTP and 1.24 CYMYP.
• Significant regional variation observed, with Sardinia exhibiting the highest incidence (2.46 CYMTP, 6.67 CYMYP).
• Mean age at SSPE onset was 10.6 years, lower in Sardinia (8.8 years). Mean age of measles infection was 2.8 years, lower in males and associated with shorter interval to SSPE.

Conclusions:

• SSPE incidence in Italy is unevenly distributed, suggesting potential environmental influences.
• Earlier measles infection, particularly in males, may be a contributing factor to SSPE development.
• Further research into environmental factors and early measles infection is warranted.