system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Common age for otosclerosis is -
assistant
The correct answer is  50% of patients of otosclerosis have positive family history.
Females are more commonly affected than males. (Note: unless and until the question says in India always mark female> male as the correct option).
Whites are affected more than negroes.
Age = most common between 20–30 years (Ans. 3) and is rare before 10 and after 40 years.
Deafness is increased by pregnancy, menopause, trauma and major operations.
Viruses like measles virus have also been associated with it.