What is the demographic most commonly affected by myasthenia gravis?

• A. Males aged 15-25
• B. Females aged 20-40
• C. Children under 10
• D. Older men over 60

Answer: (B)

Myasthenia gravis is an autoimmune disorder that primarily affects the neuromuscular junction, leading to weakness in voluntary muscles. The demographic most commonly affected is females aged 20-40. This age group is more prone to the condition, likely due to hormonal factors and genetic predisposition that may influence the immune system.

The prevalence among women in this age range suggests that the condition often develops in young adulthood, where symptoms are typically related to muscle fatigue and weakness, particularly in the eyes and face. Additionally, the presence of antibodies against acetylcholine receptors, which is characteristic of myasthenia gravis, can manifest more prominently in this demographic.

While the other groups listed may experience the condition, they are not as frequently affected. For instance, although younger males or older men can develop myasthenia gravis, they do so less commonly compared to younger women. Understanding this demographic distribution is crucial for early diagnosis and management of the condition.