Respiratory morbidity in Rett syndrome: an observational study

Area of Science:

• Neurology
• Pediatrics
• Respiratory Medicine

Background:

• Rett syndrome is a rare genetic neurodevelopmental disorder primarily affecting girls.
• Respiratory complications, including lower respiratory tract infections (LRTI), are a significant cause of morbidity and mortality in Rett syndrome.
• Understanding risk factors for respiratory illness is crucial for improving patient outcomes.

Purpose of the Study:

• To investigate the incidence of respiratory morbidity in individuals with Rett syndrome.
• To examine the relationship between hospital admissions for LRTI and factors such as age, mutation type, feeding method, and mobility status.
• To identify potential protective or risk factors for respiratory health in Rett syndrome.

Main Methods:

• A retrospective study utilizing data from the InterRett database, including 399 individuals with Rett syndrome (aged 2-57 years).
• Data on hospital admissions for LRTI over a 5-year period were collected and analyzed.
• Statistical analysis, including adjusted relative risks and 95% confidence intervals, was used to assess the influence of various factors.

Main Results:

• Approximately 21.4% of individuals experienced at least one hospital admission for LRTI within the 5-year period.
• Enteral feeding was associated with a nearly twofold increased risk of hospital admission for LRTI (adjusted RR 1.79).
• Individuals unable to walk independently had a significantly higher risk (sixfold) of LRTI hospitalization compared to those who walked independently; assisted walking showed an intermediate risk.

Conclusions:

• Rett syndrome confers increased vulnerability to LRTI requiring hospitalization.
• Enteral feeding is a significant risk factor for LRTI-related hospital admissions.
• Mobility status, particularly the ability to walk independently or with assistance, plays a protective role in respiratory health for individuals with Rett syndrome.