Comorbidities in Perthes' disease: a case control study using the General Practice Research database

Area of Science:

• Pediatric Orthopedics
• Epidemiology
• Genetics

Background:

• Perthes disease is a childhood hip disorder involving osteonecrosis with an unknown cause.
• Previous studies suggest comorbid associations, but their validity remains unclear.

Purpose of the Study:

• To investigate associations between Perthes disease and previously suggested comorbid conditions.
• To explore potential etiological insights through case-control analysis.

Main Methods:

• A case-control study utilized the United Kingdom General Practice Research database.
• Included 619 cases of Perthes disease and 2544 controls.
• Investigated associations with congenital anomalies, behavioral disorders, and asthma.

Main Results:

• Significantly increased risk of Perthes disease associated with hypospadias (OR 4.04), undescended testis (OR 1.83), and inguinal hernia (OR 1.79).
• Generalized behavioral disorder showed an association (OR 1.55), but attention deficit hyperactivity disorder did not (OR 1.01).
• Asthma significantly increased risk (OR 1.44), independent of steroid use.

Conclusions:

• Perthes disease shows significant associations with congenital genitourinary and inguinal anomalies.
• Findings suggest intra-uterine factors may play a critical role in Perthes disease causation.
• Further research into comorbid associations can refine etiological theories.